| Test Hardware | |
|---|---|
| AC Source | Chroma Programmable AC Source 6530 |
| Power Meter | Yokogawa WT210 Digital Power Meter |
| Loads | 4 x 600 W Chroma 63306 for 12 V testing 4 x 300 W Chroma 63303 for 5 and 3.3 V testing using Chroma HighSpeed- DC Load Mainframes 6334 |
| Oscilloscope | Tektronix DPO3034 Digital Phosphore Oscilloscope (300 MHz) |
| Test Procedure | |
| Voltages | 110 and 230 V |
| Standby Power | 0.25 A fixed current to simulate PC standby power on 5 Vsb |
| 80 PLUS Efficiency Testing | 100/50/20% load, relative to specified total output Load distribution across 12/5/3.3V rails at the same proportion as specified for 100% testing at 110 V according to ATX 2.3 specification |
| Efficiency at Fixed Loads | 25, 50, 85, 300, 500 W loads Load distribution across 12/5/3.3 V rails at the same proportion as specified for 100% |
| Peak Load Test | 110% Overload Testing at maximum combined 12 V |
| Temperature Test | Air intake vs. Outtake temperature delta tracking highest delta during all tests |
Hold-Up Time, Inrush Current, Peak, and Short Circuit Tests:



| Short Circuit Protection Test (12 V) | |
|---|---|
| Model | Test Passed |
| Antec True Power New 750 W (115 V) | yes |
| Antec True Power New 750 W (230 V) | yes |
| BeQuiet StraighPower 580 W (115 V) | yes |
| BeQuiet StraighPower 580 W (230 V) | yes |
| Chieftec NTRO 85 (115 V) | yes |
| Chieftec NTRO 85 (230 V) | yes |
| Cooler Master GX 750 (115 V) | yes |
| Cooler Master GX 750 (230 V) | yes |
| Cooler Master Silent Pro Gold 700 (115 V) | yes |
| Cooler Master Silent Pro Gold 700 (230 V) | yes |
| Corsair AX850 (115 V) | yes |
| Corsair AX850 (230 V) | yes |
| Cougar SX S700 (115 V) | yes |
| Cougar SX S700 (230 V) | yes |
| Enermax Modu 87+ 700 W (115 V) | yes |
| Enermax Modu 87+ 700 W (230 V) | yes |
| NZXT HALE90-750M 115 V) | yes |
| NZXT HALE90-750M (230 V) | yes |
| OCZ Fatality Champ 750 W (115 V) | yes |
| OCZ Fatality Champ 750 W (230 V) | yes |
| Seasonic X-Series 750 W (115 V) | yes |
| Seasonic X-Series 750 W (230 V) | yes |
| Sparkle SCC-750AF (115 V) | yes |
| Sparkle SCC-750AF (230 V) | yes |
Previous
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Summary
- New Tests: Ripple And Noise
- Antec TP-750
- Antec TP-750: Results
- be quiet! Straight Power E8
- be quiet! Straight Power E8: Results
- Chieftec BPS-750C
- Chieftec BPS-750C: Results
- Cooler Master GX 750
- Cooler Master GX 750: Results
- Cooler Master Silent Pro Gold 700
- Cooler Master Silent Pro Gold 700: Results
- Corsair CMPSU-AX850
- Corsair CMPSU-AX850: Results
- Cougar SX700
- Cougar SX700: Results
- Enermax Modu 87+ 700 W
- Enermax Modu 87+ 700 W: Results
- NZXT HALE90-750M
- NZXT HALE90-750M: Results
- OCZ Fatal1ty 750 W
- OCZ Fatal1ty 750 W: Results
- Seasonic X-750
- Seasonic X-750: Results
- Sparkle SCC-750AF
- Sparkle SCC-750AF: Results
- Test Configuration, Hold-Up Time, Inrush Current, Peak, And Short Circuit Tests
- Efficiency According To 80 PLUS, Temperature, And Standby Overview
- Efficiency Under Different Load Profiles
- Conclusion And Recommendation
Ask a Category Expert
The article doesn't appear to measure noise from during switching and how much noise is introduced to the CPU and bus.
Anyway, it will be a cold day in hell before anyone gets me to switch out my Silverstone 1500 Watt PSU.
You are either lying or very unlucky (got a bad PSU)......I have crossfire 5870s and an i7 965 and all stock cannot exceed 650W at the wall (about 550W actually used) no matter what I try.
I call BS. I could run your setup with my PC power & cooling 750w unit.
http://www.techspot.com/review/289-geforce-gtx-480-sli-versus-radeon-5870-crossfire/page9.html
My next build will be in an NZXT full tower, and I am particularly interested in the Antec 850W, which I believe is the same line as the 750 tested. The report mentioned something about the cables being a bit short for full towers, I'd like to know exact cable lengths, and does anyone know if the 850W model cables may be a little longer?
You're kidding right? You mention the NZXT power supply as "being one of the best", but no mention or recommendation for the Seasonic (even tough according to your own tests the Seasonic handily beats the NZXT)?
Seasonic is one of the, if not thee, best power supply houses in the land. Most of the times if you see a real good power supply from another brand, it turns out it was a Seasonic unit. I'm not saying there are no other good manufacturers out there... But, to not even to get a nod or anything in the conclusion??
Review fail.
So, essentially it will pick away at your RAM. No thanks.
"...its single +12 V rail (preferable to all of the units with dinkier +12 V output spread over multiple rails)..."
I call BS. I'd much rather have multiple +12V rails. With OCP set appropriately, there's no issue of power being "trapped" anywhere, yet it will be safer in the event of near short-circuit conditions.
I'll be building either a SB or BD rig for myself in late Spring or early Summer, and I already picked up the 560W model of the Seasonic "X" line for it ($71 for the one HardwareSecrets reviewed).
Remember too, that 80+ tests at the absurdly low ambient temperature of 23C. While I think their tests are still generally valid, and will certainly clear out the liar-labeled units, for a certified unit to fail by a couple percent under real world conditions is not too unusual.