1000W-1200W Roundup: Five High-End PSUs
by Martin Kaffei on December 9, 2010 1:20 PM ESTAntec HCP-1200 Regulation
| +3.3V regulation | |
| Load | Voltage |
| 10% | +0.91% |
| 20% | +0.00% |
| 50% | -0.91% |
| 80% | -1.52% |
| 100% | -2.72% |
| 110% | -3.64% |
| +5V regulation | |
| Load | Voltage |
| 10% | +0.00% |
| 20% | -0.20% |
| 50% | -0.60% |
| 80% | -1.20% |
| 100% | -1.60% |
| 110% | -2.00% |
| +12V regulation | |
| Load | best/worst |
| 10% | +1.42% / +1.08% |
| 20% | +1.50% / +1.25% |
| 50% | +1.50% / +1.00% |
| 80% | +1.00% / +0.58% |
| 100% | +0.58% / +0.25% |
| 110% | +0.33% / +0.00% |
Wow! No, seriously, check out the 12V regulation. It starts just over 1% high and at 110% overload it still delivers the ideal voltage. +5V starts at the ideal and drops just 2%, which is also good. The 3.3V rail shows a more significant drop, but it's not as critical on modern systems and it's still within spec.
Ripple and Noise
| +3.3V ripple quality | |
| Load | Ripple and noise |
| 10% | 8.80mV |
| 20% | 9.20mV |
| 50% | 11.50mV |
| 80% | 16.30mV |
| 100% | 19.70mV |
| 110% | 18.70mV |
| +5V ripple quality | |
| Load | Ripple and noise |
| 10% | 13.20mV |
| 20% | 15.10mV |
| 50% | 23.70mV |
| 80% | 29.20mV |
| 100% | 31.50mV |
| 110% | 35.50mV |
| +12V ripple quality | |
| Load | Ripple and noise |
| 10% | 9.90mV |
| 20% | 9.90mV |
| 50% | 13.30mV |
| 80% | 18.20mV |
| 100% | 19.70mV |
| 110% | 19.90mV |
+5V shows some undershoots, which is why we see the higher results on that rail. The other rails have hardly any ripple or noise. Particularly impressive is the +12V result, with ripple always below 20mV. The oscilliscope showed very clean results with no transients.
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dubyadubya - Friday, December 10, 2010 - link
Corsair supplies are great and should have been included in any review. You make it sound like Corsair makes their own supplies but they don't. The AX series is made by Seasonic and based on the X series. Their other supplies are made either by CWT or Seasonic. Both of which make great supplies. So in reality any PSU comparison review must include supplies built by Seasonic and CWT.scook9 - Friday, December 10, 2010 - link
Actually the AX1200 that is the king of the desktop power supplies right now is made by Flextronics. Corsair uses 2 different OEMs in their AX line up. This is why the AX1200 is the only model from the AX line I would consider. I already have a HX850 so would gain next to nothing with a AX850brotj7 - Friday, December 10, 2010 - link
If a midtier review is being considered, please include some push/pull designs, or at least some high quality PSU's with an open grate in the front, and a fan in the back. Some of us are stuck with cases with wind tunnels like an antec p180 and the like, these do not lend well to a top/bottom mounted fan.Wander7 - Friday, December 10, 2010 - link
I've had 2 Antec Neos die on me the last three years. Hope no one else has my luckvol7ron - Friday, December 10, 2010 - link
Cougar has a CMX 1000w PSU, does anyone know how this compares to the GX 1050?Martin Kaffei - Monday, December 13, 2010 - link
It's a little bit worse.Same fan, less 8-pin PCIe connectors, less efficiency.
TechieFan - Saturday, December 11, 2010 - link
When you perform a more thorough review, please include the "Thermaltake ToughPower 80 Plus Power Supply". I just purchased one and would love to know how it stacks up vs. the competition.I'd also appreciate a bit more detail regarding the comment that a 1200 is overkill for most people. While I'm sure that's true, if you run some of the powersupply estimators availble online it's somewhat surprising how much power they suggest (I run two GTX 580's (not 3) to my HP ZR30W and they suggested a 1075 psu minimum with my setup.)
METALMORPHASIS - Sunday, December 12, 2010 - link
http://www.newegg.com/Product/Product.aspx?Item=N8...I don't need anything bigger to start my car with yet.
And thats more than enough for my rig today.
JimDDuncan - Monday, December 13, 2010 - link
Alot of people asked for ax1200 for good reason. Jonnyguru has a very complete test of this psu. It is rated very high on efficiency. No mention of it there but more than a few buyer reviews complain of coil whine. There is also a youtube vid displaying this. Still my choice and arrives tomorrow. Btw another site successfully ran four gtx 480s on it. Impressive but point of diminishing returns. Good luck with your choices. If this post stays up I will continue to visit this site. New here.Sabresiberian - Wednesday, December 15, 2010 - link
Anandtech has run tests on mainstream PSUs recently - and runs more of them than on these kinds of PSUs. As far as people like you it's an obvious waste of time anyway, I doubt you'd actually read the articles if you found them.