Dieser Artikel auf Netzteil Effizienz für eine moderne Sandbrücke Gaming-PC schließt sich an 3 vorheriger Artikel, etwa Netzteil Effizienz für eine mittlere Leistung Server, ein Medium Gebrauch sehr hohe Leistung Gaming-PC und Low-Power-Server oder HTPC.
In this article I’m going to assume the system is operated from 4pm — 10pm weekdays and 10am — 11pm weekends at full power. I’m also going to assume the system is on and idle for the rest of the time.
Die system in question pulls ~45w idle and ~247w under full load. I’m assuming an AMD Radeon HD 6870 (18w idle, 163w full) instead of the EN9400GT (11w idle, 23w full), the power numbers are adjusted accordingly. All of these estimates are deliberately on the high side. I expect a typical PC will spend more time off, more time idle, and wont be loaded as intensely as the example.
The figure for the generic Netzteil is based on the minimum requirement and is therefore a worst case. Auch bei einer sehr schlechten Wirkungsgrad Netzteil die AC-Unentschieden von der Wand nicht zu erhöhen, wie die DC-Unentschieden sinkt. Ich habe ein Best-Case jährlichen Einsparung berechnet, based on a kWh charge of 10p.
| Make / Model | Efficiency at idle (45Die) | Efficiency at load (247Die) | Ist. A.C. Leistungsaufnahme (müßig) | Ist. A.C. Leistungsaufnahme (Last) | Sparen |
| ATX v2.2 400w | 65% (at 45w) | 70% (at 247w) | 69Die | 353Die | |
| Seasonic X‑400 | 80.4% (at 42.6w) | 91% (at 248.4w) | 56Die | 271Die | £31.43 |
| Corsair AX850 | 77.3% (at 43w) | 90.4% (at 251w) | 58Die | 273Die | £29.70 |
| Enermax 500W Modu87 | 77.5% (at 43.4w) | 90.5% (at 250.6w) | 58Die | 273Die | £29.88 |
| Corsair CX400W | 73.2% (at 43.2w) | 85.5% (at 250.6w) | 61Die | 289Die | £23.14 |
| Kingwin Lazer Platinum 550W | 83.2% (at 41.6w) | 93.8% (at 248.6w) | 54Die | 263Die | £34.89 |
| HuntKey Jumper R90 300W 80+ Gold | 88% (at 60W) | 89% (at 250w) | 51Die | 281Die | £32.59 |
The conclusion is no longer clear. The value of an upgrade has improved over the previous scenario with a gaming PC. However, even with a lot of heavy use, and comparing the most efficient Netzteil’s with the worst a budget ATX Netzteil can perform, a new Netzteil will still take around 4 years to pay for itself. A real world upgrade is unlikely to net this much saving.
If you are considering replacing an existing Netzteil my advice would be not to bother, unless you have additional reasons. If you are buying new then it is worth paying more for a better Netzteil, within reason. Of course if you want the efficiency for other reasons (wenig Lärm, low heat) then those factors may make the value difference irrelevant.
Aktualisierung (25-Dec-2011)
Corrected slight error for Modu87+ and added the HuntKey Jumper R90. This Netzteil changes the conclusion for anyone with a low efficiency Netzteil. It produces savings of over £30, which is approximately the price of the Netzteil! A payback period of 1 Jahr, with an expectation that electricity prices will continue to rise is well worth the investment.
“Hi James I realise it has been a long while, but I just checked this on windows 11 (build 23H2)…”