0PSU لوگوPSU مستعدی: اپ گریڈ کے قابل? part 3

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This is the third install­ment in a series of art­icles address­ing PSU effi­ciency. Art­icle one focused on a [int­link id=“76” type=“post”]نظریاتی نئے سرور[/intlink], فن icle 2 ایک پر [int­link id=“77” type=“post”]عام ڈیسک ٹاپ پی سی[/intlink].  This art­icle will focus on a cur­rent real serv­er, and intro­duces a new PSU — an 80+ plat­in­um model.

The sys­tem spends a lot of time semi-idling (serving net­work and disk requests but not doing too much سی پی یو کام).  I estim­ated that it would pull around 150W on aver­age, and then cal­cu­lated it below. It really did come out exactly like that!

Base sys­tem Sem­pron LE-1100 (1.9گیگاہرٹج سنگل کور) nForce 630i پر / 7050 mother­board. 2Gb DDR-II35W
2x Sam­sung F4 2Tb HDDs, 7X 1TB گرین HDDs انکا. WD گرین 1TB, Seag­ate 1Tb and Sam­sung 1Tb, 1X WD 750GB 7200rpm ڈرائیو, 1x Max­tor 300Gb 7200rpm drive, 1X WD 200GB 7200rpm IDE ڈرائیو108W
Areca 1220 RAID کارڈ5W
2ایکس 120mm کیس فین2W
TOTAL150W

دلچسپی کے آؤٹ, assum­ing a cost of £0.10 per kWh this sys­tem would cost a total of £131.50 a year to run even with a per­fectly effi­cient PSU!

The ATX spe­cific­a­tion requires 70% effi­ciency. Below is a com­par­is­on between a bare min­im­um ATX PSU and a few highly effi­cient PSUکے.

The fig­ure for the gen­er­ic PSU is based on the min­im­um require­ment and is there­fore a worst case. I have cal­cu­lated a best-case yearly sav­ing, based on a kWh charge of 10p and assum­ing 24.7 usage.

Make / ModelEffi­ciency at 150WEst. A.C. بجلی کی قرعہ اندازیSav­ing
ATX V2.2 250W ATX70% (150W اوپر)215W
Season­ic X‑40088.8%169W£ 40،39
Cor­sair AX85087.4%172W£ 38،02
Ener­max Modu87+ 500w88.5%169W£ 39،89
Cor­sair CX400W82.1%183W£ 28.31
King­win Lazer Plat­in­um 550W93.3%161W£ 47،54
HuntKey Jump­er R90 300W 80+ Gold90%167W£ 41،74

Con­clu­sion: This is the first scen­ario where new high­er-effi­ciency اپکرموں are reas­on­ably price com­pet­it­ive based only on power usage. For such a sys­tem, a high effi­ciency PSU will pay for itself with­in approx­im­ately 3 years. If you plan to keep the sys­tem for more than 3 years a high effi­ciency PSU is a worth­while invest­ment as its TCO will be lower. As energy prices con­tin­ue to rise this TCO advant­age will widen.

اپ ڈیٹ (25-دسمبر 2011)

Added the HuntKey Jump­er R90. This PSU changes the con­clu­sion con­clus­ively. It pro­duces sav­ings of over £40, جس میں کم از کم کی قیمت ہے PSU!  A pay­back peri­od of 1 سال, with an expect­a­tion that elec­tri­city prices will con­tin­ue to rise is well worth the investment.

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