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0पीएसयू लोगोLow power PCnew or old PSU

I have a server that operates 24.7. It occurred to me that I may be able to save some money on electricity bills if I could reduce its power consumption. It already has a low power AMD Sempron LE-1100 सीपीयू so the power draw of the system should be quite low, लेकिन वो पीएसयू is quite old and not especially efficient. This got me thinking about Power supplies designed for low power systems. वहाँ बहुतायत है 80+ certified पीएसयू'के साथ वहाँ बाहर है 500+ watt ratings, but are these actually worth the investment for a low power system?


My system spends most of its time idle so I decided I’d work out the power draw would be if I were to build a new system with current components to do it’s job..

Base system (उदाहरण के लिए:. atom or Core i5)18में
4x 2Tb (उदाहरण के लिए:. Samsung EcoGreen F3)19में
इस RAID कार्ड (उदाहरण के लिए:. ऐरेका 1220)5में
1x 120mm Case / HDD Fan (उदाहरण के लिए:. Nexus Real Silent 120mm)1में
कुल43में

Using the above figures, I estimate that a new system with a similar role and capability to what I have will consume just under 45watts at idle.

For a typical low spec (450w) पीएसयू, this load is only 10%. At this low a load a typical पीएसयू can be quite inefficient. The ATX विनिर्देश की आवश्यकता है 70% efficiency at 20% of rated power, but a 43W draw is below 20% rated power for all पीएसयू’s rated for 250W or above (in effect all पीएसयूके). Below is a comparison between a bare minimum ATX पीएसयू और कुछ अत्यधिक कुशल पीएसयूके.

सामान्य के लिए आंकड़ा पीएसयू is based on the minimum requirement and is therefore a worst case. Even with a very poor efficiency पीएसयू डीसी ड्रा घटने के रूप में दीवार से एसी ड्रा में वृद्धि नहीं होगी. I have calculated a best-case yearly saving, 10p और यह सोचते हैं की एक kWh आरोप के आधार पर 24.7 प्रयोग.

बनाना / मॉडलEfficiency at 43WEst. Total power draw (बेकार)सहेजा जा रहा है
ATX v2.2 250W ATX70% (at 50W)61में
Seasonic एक्स 40080.4% (at 42.6W)53में£6.97
Corsair AX85077.3% (at 43W)55में£5.09
Enermax Modu87 + 500w77.5% (at 43.4W)56में£5.21
Corsair CX400W73.2% (at 43.2W)59में£2.35
Sparkle Power SPI220LE FlexATX 220W80.5% (at 42.4w)53में£7.02
Huntkey जम्पर R90 300W 80+ सोना85% (at 30w)51में£9.50

निष्कर्ष: For a low power system it is cheaper, and probably more environmentally sound to keep (or re-use) an existing power supply than to replace it with a high power model, even if the new model is very efficient.

अद्यतन (25-Dec-2011)

Corrected a calculation error and added the HuntKey Jumper R90. Even a very good value, highly efficient पीएसयू can’t change the conclusion much in this scenariothe savings are just far too small to justify the cost (and environmental cost) of a new पीएसयू. The HuntKey would take in excess of 3 खुद के लिए भुगतान करने के लिए साल, and this is in an ideal scenario, compared to a a worth case scenario पीएसयू! For an even lower power system (उदाहरण के लिए:. a AMD E350) the savings would be lower still. Even aperfectपीएसयू would only net savings of around £16 a year!

इस उपयोगी पाया? कृपया हमें सूचित करते नीचे एक टिप्पणी छोड़ने के द्वारा. आप सदस्यता के लिए चाहते हैं, तो ऊपर दाईं ओर मेनू पर लिंक का उपयोग करें सदस्यता लें. आप नीचे दिए गए सामाजिक लिंक का उपयोग करके अपने दोस्तों के साथ इस साझा कर सकते हैं. चियर्स.

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