What is power headroom? Power headroom indicates how much transmission power left for a UE to use in addition to the power being used by current transmission. …. PHR is a type of MAC CE (MAC Control Element) that report the headroom between the current UE Tx power (estimated power) and the nominal power.Ten raised to the sixth power is equal to one million or 1,000,000, which is a one followed by six zeros. Raising a number to a power of six is the same as multiplying the number b...Oct 24, 2018 · Headroom is the secret sauce for reproducing effortless music. Headroom maintains an amplifier (or speaker's) linear performance region—an area we hope to keep sacred. Once we exceed an instrument's linear region, its sweet spot, sound changes and not for the better. The closer we get to a device's limits the less free and open the music will ... Pros and Cons of Nuclear Power - The pros and cons of nuclear power include less dependence on fossil fuels but more radioactive waste. Learn more pros and cons of nuclear power. A...Usually I suggest 100-150W headroom for anyone though - for peaks and spikes. Archangel (Desktop) CPU: i5 4590 GPU:Asus R9 280 3GB RAM:HyperX Beast 2x4GBPSU:SeaSonic S12G 750W Mobo:GA-H97m-HD3 Case:CM Silencio 650 Storage:1 TB WD Red. Celestial (Laptop 1) CPU:i7 4720HQ GPU:GTX 860M 4GB RAM:2x4GB SK …ETSI 3GPP TS 38.213 version 16.2.0 Release 16 2 ETSI TS 138 213 V16.2.0 (2020-07) Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI.The process 800 may repeat one or more times. FIG. 9 shows a block diagram 900 of a wireless device 905 that supports power headroom report for LTE-NR co-existence in accordance with aspects of the present disclosure. Wireless device 905 may be an example of aspects of a user equipment (UE) 115 as …The present invention provides the calculation method of power headroom and terminals, the described method includes: S11, in a cycle of physical downlink control channel PDCCH, the theoretical emitted power of transmission uplink synchronizing signals and the theoretical emitted power of Physical Uplink Shared Channel PUSCH transmission …If you’ve ever had a power tool stop working and wondered how to replace the part that broke, this it the article for you. There are several options available to you if you need to...I would wait until I got the newer graphics cards to replace PSU. It is not only headroom, but power spikes of the newer GPU that PSU will need to handle, and there will be more that meet this requirement in the future. It is not just enough to have headroom for the spikes, but to be able to handle the sudden current surge without tripping.Sep 28, 2022 · The adapter has an active circuit that detects and reports the power capacity to the graphics card based on the number of 8-pin connectors plugged in. This enables the RTX 4090 to increase the power headroom for overclocking when 4x 8-pin connectors are used versus 3x 8-pin connectors. 【課題】無線通信システムにおいてパワーヘッドルーム報告を送信する方法及び装置を提供する。【解決手段】第1セル及び第2セルを有するアクティブセルに対するPHR MAC CE（Power Headroom Reporting MAC Control Element）を生成するステップと、サブフレームにおいて、ネットワークに、前記生成されたPHR ...• RLC DISCARDs will trigger TCP congestion control and lower throughput • BSR buffer status report 0(0KB) to 64 (15KB), power headroom report • Interference power > -104dBm • Link adaptation considers PHR, recived power of UE and UL interference power • QoS profile QCI, priority bit, AMBR, ARP • DSCP differentiated servise code point.Power Fx is the low-code language that will be used across Microsoft Power Platform. It's a general-purpose, strong-typed, declarative, and functional programming language. Power Fx is expressed in human-friendly text. It's a low-code language that makers can work with directly in an Excel-like formula bar or …I've noticed more headroom in a few pedals, but they all specified that they could be run at 18v. certain ic's are designed to operate and and happier above the 9v that is more than often the standard with power supplies. the catalinbread echorec has a whole different vibe when running at 18v as well as their old harmonic trem the …The process 800 may repeat one or more times. FIG. 9 shows a block diagram 900 of a wireless device 905 that supports power headroom report for LTE-NR co-existence in accordance with aspects of the present disclosure. Wireless device 905 may be an example of aspects of a user equipment (UE) 115 as …In today’s digital age, it has become common for individuals to leave their computers on 24/7. However, there are many benefits to completely shutting off your computer when it is ...Nominally if you want more clean headroom then yes, you need more watts. Low watt amps are all about getting distorted without excessive volume. Fender Twins or Roland Jazz Choruses are classic amps for clean …Using LTE Power Headroom Report for Coverage Optimization. In IEEE Vehicular Technology Conference , VTC Fall, September 5-8, 2011, San Francisco, California, USA (pp. 1-5). (IEEE Vehicular Technology Conference VTC).Power headroom report-based uplink power control in 3GPP LTE-A HetNet. In a 3rd Generation Partnership Project Long Term Evolution-Advanced (3GPP LTE-A) uplink, user equipment (UE) has a maximum transmission power limit defined by the UE power class. Generally, the cell edge UE has a higher probability to be constrained by the maximum ...【課題】無線通信システムにおいてパワーヘッドルーム報告を送信する方法及び装置を提供する。【解決手段】第1セル及び第2セルを有するアクティブセルに対するPHR MAC CE（Power Headroom Reporting MAC Control Element）を生成するステップと、サブフレームにおいて、ネットワークに、前記生成されたPHR ...Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for a power headroom report for multiple radio access technologies (RATs). A user equipment (UE) may support multiple RATs that correspond to different transmission time intervals (TTIs). A UE may determine a reporting schedule for …Jul 27, 2018 · The process 800 may repeat one or more times. FIG. 9 shows a block diagram 900 of a wireless device 905 that supports power headroom report for LTE-NR co-existence in accordance with aspects of the present disclosure. Wireless device 905 may be an example of aspects of a user equipment (UE) 115 as described herein. P. Joshi et al.: Actual Output Power Levels of UE in 5G Commercial Networks TABLE 1. Power headroom report mapping. B. TIME-AVERAGED UE OUTPUT POWER Since every reported PH sample corresponds to ...Power Headroom: Power headroom refers to the difference between the maximum transmit power of the UE and the actual power level it is currently using. It …The present invention provides the calculation method of power headroom and terminals, the described method includes: S11, in a cycle of physical downlink control channel PDCCH, the theoretical emitted power of transmission uplink synchronizing signals and the theoretical emitted power of Physical Uplink Shared Channel …Oct 24, 2018 · Headroom is the secret sauce for reproducing effortless music. Headroom maintains an amplifier (or speaker's) linear performance region—an area we hope to keep sacred. Once we exceed an instrument's linear region, its sweet spot, sound changes and not for the better. The closer we get to a device's limits the less free and open the music will ... For more headroom, simply go for a power supply with a higher wattage. We suggest padding the headroom when working with cheaper power supplies or living in an area with hot weather.If conditions at your home are right, you might be able to get free power—for a price. Seems like everything is more expensive these days, and one of the most worrying bills hittin...Power headroom reports (PHR) are needed to provide support for power-aware packet scheduling. These are used by the UE to report the TX power used in the uplink transmissions. The UE can modify its tx power according to radio conditions, but obviously there is an upper limit on how high the tx power can be.Yes, the power supply unit (PSU) is an important component in a computer system. It is responsible for converting the alternating current (AC) power from the wall outlet into the direct current (DC) power that is used by the computer's components. The PSU also regulates the voltage and provides protection from power surges and …transmission power can be controlled according to the number of PRBs allocated using the power headroom report-based power efficient resource allocation (PHR-PERA) scheme proposed in this paper. Furthermore, adaptive open-loop power control (OL-PC) based on the signal-to-interference-plus-noise ratio (SINR) and the uplink interference is used ...“Expressed powers,” are powers granted to the government mostly found in Article I, Section 8 of the US Constitution within 18 clauses. A total of 27 expressed powers are given to ...What is claimed: 1. A method implemented by a device, the method comprising: accessing power headroom control information; determining that one or more conditions for generating a power headroom report have been met; and generating, based on the determination, a bandwidth part (BWP) based power headroom report …Features. NOS Russian (6n14n) EL84 tubes; 1 x 12″ Celestion Gold alnico speaker; 30 watts of power; High headroom; Review. Overbuilt to exude the utmost essence of prestige quality, the Dr. Z Z Wreck is a sight to behold. Its cabinet will withstand the rigors of road abuse, and its understated aesthetics will stand the test of time.ETSI 3GPP TS 38.213 version 16.2.0 Release 16 2 ETSI TS 138 213 V16.2.0 (2020-07) Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. Amplifier headroom is the amount of power that an amplifier is able to generate before it starts overdriving. Overdriving means adding gain to the signal, natural gain coming from either the preamp, or the power amp section, or both. In other words, amplifier headroom is just how loud and clear can an amplifier be naturally. Apr 10, 2015 · The power headroom shall be estimated only in a subframe where PUSCH is transmitted. Power Headroom Report Control Element. Power Headroom Report MAC control element is of single octet long. It has three field with the two left most bits reserved. The rightmost 6 bits are defined as PH field. PH of Power headroom field corresponds to the power ... Power-Assisted Ventilated Front Disc/Solid Rear Disc Brakes: 11.5 in / 11.1 in. 11.5 in / 11.1 in. 12.3 in / 11.1 in. 12.3 in / 11.1 in. 12.3 in / 11.1 in. 12.3 in / 11.1 in. Wheels: 17 in Silver-Painted Alloys. 17 in Pewter-Painted Alloys. 19 in Machine-Finished Alloys with Black Inserts. 17 in Pewter-Painted Alloys. 19 in Alloys with Matte ...Mechanical. Regenerative 4-Wheel Disc Brakes w/4-Wheel ABS, Front And Rear Vented Discs, Brake Assist, Hill Hold Control and Electric Parking Brake. Lithium Ion (li-Ion) Traction Battery w/11.5 kW ...The process 800 may repeat one or more times. FIG. 9 shows a block diagram 900 of a wireless device 905 that supports power headroom report for LTE-NR co-existence in accordance with aspects of the present disclosure. Wireless device 905 may be an example of aspects of a user equipment (UE) 115 as described herein.Jun 14, 2022 · Headroom in the Analog Recording World. Technically speaking, headroom (when measured in d eci B els) is the ratio of the maximum amount of undistorted signal a system can handle compared to the average level for which the system is designed. For example, suppose you have a home recording setup with a nominal -10dB average level. Feb 12, 2020 ... Finally we combine the power data with local income data and find that the economic data adds support to our approach. Page 6. frontier ...Apr 15, 2023 · Corsair RM1000X 1000W PSU. $163 $190 Save $27. It's no $50 special, but it's one of the top rated PSUs around with high-efficiency, quiet operation, and power to run next-gen GPUs. $163 at Amazon See at Bestbuy. And, in the age of $1000 GPUs, spending a little more to support and protect your hardware investment isn't a bad idea. tribution of power headroom samples in 15 minutes and. 6 minutes (specified as the averaging time by ICNIRP [1] for localized RF EMF exposure) seems reasonable. In addition, according to studies ...Dec 9, 2022 · The access network 108 may control power headroom reporting by using radio resource control (RRC) signaling to configure one or more of the following parameters: a periodic timer (phr-PeriodicTimer), which is a value in number of subframes for PHR reporting; a prohibit timer (phr-ProhibitTimer), which is a value in number of subframes for PHR ... A Deep Neural Network (DNN) based model is proposed to predict the PHR and reduce dependency on reported measures in a 5G experimental prototype and results show that using DNN outperforms state-of-the-art machine-learning approaches in terms of prediction accuracy, computation complexity and …In this example, the system is set to have an allowed minimum power headroom of 2 kW. The power demand is shown in purple and the power headroom in green, as its complement. It can be seen that the power headroom only reaches its critical level after two PSU faults. When these analyses are performed over forecasts, it enables …Power Headroom Report MAC control element tells if UE can transmit at a higher transmission power or not. In basic terms this indicates how much relative …What is claimed is: 1. A method for reporting power headroom by a user equipment (UE) to an evolved NodeB (eNB) in a Multi-Radio Access Technology (RAT)-Dual Connectivity (MR-DC) scenario, the method comprising: generating, by the UE, a DC Power Headroom Report (PHR) Medium Access Control (MAC) Control Element …ETSI 3GPP TS 38.213 version 15.6.0 Release 15 2 ETSI TS 138 213 V15.6.0 (2019-07) Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI.The Boulder is a teardrop shape, but the larger Golden and Denver will have hardshell toppers that retract when you’re driving. Fully extended, they’ll have 6 feet, 6 …The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor control centers shall be 6 feet 3 inches (1.91 m). 1926.403(i)(2) Guarding of live parts. 1926.403(i)(2)(i) Except as required or permitted elsewhere in this subpart, live parts of electric equipment operating at 50 volts or more shall be …Dec 6, 2018 ... Let's talk about Condor's gain, headroom, and power rail distortion. All the things. Full disclosure, in addition to this trimmer tweak I am ...What is claimed is: 1. A method for reporting power headroom by a user equipment (UE) to an evolved NodeB (eNB) in a Multi-Radio Access Technology (RAT)-Dual Connectivity (MR-DC) scenario, the method comprising: generating, by the UE, a DC Power Headroom Report (PHR) Medium Access Control (MAC) Control Element …The method includes transmitting the power headroom report on the physical uplink shared channel resource, wherein: determining the power headroom report comprises determining whether the power headroom report is based on a real transmission or a reference format based on signaling for configured grants and downlink control …Hand-powered generators are great travel gadgets. Learn more about hand-powered generators at HowStuffWorks. Advertisement Sometimes we take our modern electrical grid for granted,...power headroom reporting, K PUSCH = 4 TTI is assumed, and an abserr of ± 4d B with uniform distribution is considered. Figure 13.18 shows the performance gain of the closed-loop power control usingPower Side Mirrors with Integrated LED Turn Indicators: Body-Colored. Body-Colored & Heated. Gloss Black & Heated. Body-Colored & Heated. Gloss Black & Heated. Gloss Black & Heated. One-Touch Power Moonroof with Tilt FeatureMar 13, 2013 ... Note: Within nine months of the publication of the mention of the grant of the European patent in the European Patent.Power Headroom (PH): this field indicates the power headroom level. The length of the field is 6 bits. The reported PH and the corresponding power headroom levels are shown in Table 6.1.3.8-1 below (the corresponding measured values in dB are specified in TS 38.133);the maximum power rating. Headroom may also be available if some cores are in idle mode as shown in Figure 3, or as long as the package is operating within its thermal limit. Turbo mode speeds up the CPU to utilize available power headroom, as needed, to get an extra performance boost [3].Jul 26, 2022 · The calculated volume is 108.9db. Then I drove the same headphones setting the same DAC to output 3Vrms. The calculated volume is 118.5db. But, upstream from the DAC, in software, I attenuated the signal by the difference in volume - I had to use 10db instead of 9.6db - resulting in a volume of 108.5db. A method of performing power headroom reporting, hereafter called PHR, for a communication device configured with a plurality of uplink component carriers or parallel PUCCH and PUSCH transmission in a wireless communication system is disclosed. The method comprises reporting power headroom information of at least one of the …Apr 16, 2019 ... Sell on Reverb and get £10 back after listing your first item: https://reverb.grsm.io/sell-on-reverb5295 100 Watt amps aren't louder than 50 ...Jun 14, 2022 · Headroom in the Analog Recording World. Technically speaking, headroom (when measured in d eci B els) is the ratio of the maximum amount of undistorted signal a system can handle compared to the average level for which the system is designed. For example, suppose you have a home recording setup with a nominal -10dB average level. 2. Network Headroom Report (NHR); a. Demand Headroom Report (downloadable datasets); b. Generation Headroom Report (downloadable datasets); and 3. Network Development Plan Methodology (this document). The NHR (demand and generation) will be updated annually and the NDR will be updated biannually. 3.2 Who is it for …For these setups, it’s advisable to have a PSU headroom of around 20-30%. This extra capacity accounts for power-hungry components like high-end graphics cards or overclocked CPUs. If your power consumption calculation yields 500W, opt for a PSU with a capacity of 600W or higher to ensure stable power delivery. 3.The headroom is the difference between the input and output voltages in a series pass regulator. The headroom voltage refers to the actual voltage drop across the regulator …The invention relates to a method for transmitting power headroom information from a user equipment to the base station. The transmission is made dependent on scheduling type of the uplink resource, for which the power headroom information is to be calculated and over which it is to be transmitted. If the uplink resource is dynamically scheduled, then the …Generation headroom is calculated using reverse power capabilities of each site. Where this figure was missing in the LTDS an assumed value of 50% of firm capacity has been used; Connections to the substations with an overall RED classification are still possible, however there might be a requirement for significant network reinforcement to overcome …May 8, 2018 ... Firstly, using the maximum transmit power setting isn't advisable for a couple of reasons. The DW1000 has alot of power headroom and the output ...Apr 10, 2022 · Demand headroom is the gap between the rating of the network to supply demand, and the actual demand in that part of the network. A typical example is below. Figure 1. How demand headroom works on the network using a simplified substation diagram. A bulk supply point (BSP) substation might have 2x 90MVA 132/33kV transformers. Jun 2, 2021 · Abstract. Two or more formats for Power Headroom (PH) and maximum transmit power (Pcmax), and corresponding mapping tables, are defined. For example, both 6-bit and 7-bit PH and Pcmax formats are defined. In many cases, particularly when operating in the higher frequency FR2 range, a 7-bit PH or Pcmax may be required to adequately convey power ... Baseline Load Growth in Sensitivity Case. While the baseline load trajectory is based on summer and winter growth of 0.4% per year in the sensitivity case, the 2021-2050 rate of change for baseline load appears negative in figures. This is due to the transition from a summer-peaking system to a winter peaking system with electrification. For the uplink, the power availability, or power headroom is defined as the difference between the nominal maximum output power and the estimated output power for UL-SCH transmission. This quantity can be positive as well as negative (on a dB scale), where a negative value would indicate that the network has scheduled a higher data rate than the …文章浏览阅读4.2w次，点赞21次，收藏126次。1.什么是PH和PHRPH，全称Power Headroom，中文为功率余量，即UE允许的最大传输功率与当前评估得到的PUSCH传输功率之间的差值，用公式可以简单的表示为：PH = UEAllowedMaxTransPower - PuschPower。它表示的是除了当前PUSCH传输所使用的传输功率之外，UE还有多少传 …The Chevrolet SS is the unsung hero of the racetrack, a sleeper sedan with the heart of a lion. Beneath its unassuming exterior lies a V8 beast, ready to pounce at a moment's notice. It's the perfect blend of family sedan practicality with a mischievous streak of raw power. Audi R8. Headroom: 38.5 in Legroom: 40.9 inthere is limited headroom or where the stem will interfere with some other part of the installation, such as a ceiling. The major disadvantage of the non-rising stem gate …Power Headroom: Power headroom refers to the difference between the maximum transmit power of the UE and the actual power level it is currently using. It …Equations used to calculate the data:dBW = Lreq - Lsens + 20 * Log (D2/Dref) + HRW = 10 to the power of (dBW / 10) Where: Lreq = required SPL at listener. Lsens = loudspeaker sensitivity (1W/1M) D2 = loudspeaker-to-listener distance. Dref = reference distance. HR = desired amplifier headroom. dBW = ratio of power referenced to 1 watt.The present invention provides the calculation method of power headroom and terminals, the described method includes: S11, in a cycle of physical downlink control channel PDCCH, the theoretical emitted power of transmission uplink synchronizing signals and the theoretical emitted power of Physical Uplink Shared Channel PUSCH transmission …In today’s digital age, it has become common for individuals to leave their computers on 24/7. However, there are many benefits to completely shutting off your computer when it is ... An improved method and an apparatus for reporting Power Headroom (PH) of a UE are provided. The Power Headroom Report (PHR) method of the present invention includes determining whether to trigger PHR based on a change of Power Management Maximum Power Reduction (P-MPR) between two time points, generating, if PHR is determined to be triggered, Power Headroom, and reporting the Power Headroom ... Power headroom provides an indication of how far from the rated power the power amplifier has to operate before it enters a non-linear region of operation. The PHR is transmitted from the UE to the eNB in order to inform the eNB about transmission power abilities or limitations at the UE. Information concerning the power spectral …This paper describes how LTE Rel' 8 power headroom report (PHR) can be used to detect outage problems in LTE networks. The paper outlines the proposed minimization of drive tests use case for PH ...The present invention provides the calculation method of power headroom and terminals, the described method includes: S11, in a cycle of physical downlink control channel PDCCH, the theoretical emitted power of transmission uplink synchronizing signals and the theoretical emitted power of Physical Uplink Shared Channel …Dec 1, 2022 · Article on Hardware alarms reduction in Radio Base Stations by forecasting Power Supply Units headroom, published in Electric Power Systems Research 213 on 2022-12-01 by Lackis Eleftheriadis+2. Read the article Hardware alarms reduction in Radio Base Stations by forecasting Power Supply Units headroom on R Discovery, your go-to avenue for effective literature search. To get best efficiency from psu, 50% usage at typical full load is a good optimal parameter. Common sense would also dictate that running at less than the fully capacity of power supply will increase lifespan. Going by phillipma's 400w estimation it's close enough to the 50% efficiency optimal.
Power Headroom is +Ve ; Means UE is still having adequate transmission power left and thus network can assign more resource blocks to UE. 2. Power Headroom is -Ve ; Means UE did not have anymore additional power left and is transmitting at more than its maximum transmitting power already. In this case …. Keen astrology
Headroom in an LDO. Low dropout voltage regulators have some “headroom,” also known as the dropout voltage, which is a small voltage above the nominal output that determines whether the component will turn on. As long as V(in) - V(out) > Headroom, then the component will give the nominal output voltage.Sep 2, 2021 ... 5G功率余量PHR · PHR报告周期 · PHR报告延迟 · 关于报告值与实际PH区间的映射，下面是LTE PHR和5G PHR映射情况的对比，LTE PHR报告范围是-23到+40 dB.参见 ...An improved method and an apparatus for reporting Power Headroom (PH) of a UE are provided. The Power Headroom Report (PHR) method of the present invention includes determining whether to trigger PHR based on a change of Power Management Maximum Power Reduction (P-MPR) between two time points, generating, if PHR is determined to …Dec 1, 2011 · TLDR. A novel strategy is presented which introduces traffic load dependent decisions for the closed-loop power control (CLPC) component to optimise the uplink throughput and provides an automatic configuration for LTE networks without further intervention by the operator. Expand. 25. 1 Excerpt. Feb 7, 2024 · Front headroom: 40.0 inchesFront legroom: 39.8 inches/40.9 inches (2020-2023) The Chevy Equinox is known as one of the more comfortable compact SUVs on the market. One of the reasons why is its ... Apparatuses, methods, and systems are disclosed for power headroom reporting for multiple uplink carriers. One apparatus 700 includes a transceiver 725 that receives 905 a configuration of a plurality of uplink carriers for a serving cell. The apparatus 700 includes a processor 705 that calculates 910 a power headroom ("PH") for …Oct 26, 2015 · Power headroom (PH) is reported by the UE to the base station to broadcast how much power the UE required in the previous subframe. Therefore, the base station may perform the effective link adaptation and the resource allocation for uplink transmission using the PH report. Dec 1, 2011 · TLDR. A novel strategy is presented which introduces traffic load dependent decisions for the closed-loop power control (CLPC) component to optimise the uplink throughput and provides an automatic configuration for LTE networks without further intervention by the operator. Expand. 25. 1 Excerpt. P. Joshi et al.: Actual Output Power Levels of UE in 5G Commercial Networks TABLE 1. Power headroom report mapping. B. TIME-AVERAGED UE OUTPUT POWER Since every reported PH sample corresponds to ...Jun 14, 2022 · Headroom in the Analog Recording World. Technically speaking, headroom (when measured in d eci B els) is the ratio of the maximum amount of undistorted signal a system can handle compared to the average level for which the system is designed. For example, suppose you have a home recording setup with a nominal -10dB average level. In today’s digital age, managing our accounts online has become an essential part of our daily lives. My AT&T Accounts is a powerful tool that allows AT&T customers to access and m...ETSI 3GPP TS 38.213 version 16.2.0 Release 16 2 ETSI TS 138 213 V16.2.0 (2020-07) Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI.17,983. 2,319. 101,590. Jul 13, 2016. #2. if you are confident in your power need calculations, then that is plenty of headroom. it's only running about 68% of the psu max which is easily in the "safe zone". those delta psu's dell uses are usually rather good quality. i have an r9-270 running on a 375w delta dell psu. ….