Antec HCP-750 80 Plus Gold
by Martin Kaffei on October 26, 2011 4:35 AM EST- Posted in
- Cases/Cooling/PSUs
- PSUs
- Antec
- 80Plus Gold
- 750W
- High Current Pro
Voltage Regulation
| +3.3V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | +1.70% (15 mV) |
| 10% | +1.58% (15 mV) |
| 20% | +1.39% (14 mV) |
| 50% | -0.61% (10 mV) |
| 80% | -1.61% (13 mV) |
| 100% | -2.06% (16 mV) |
| 110% | -2.30% (15 mV) |
| Crossload +12V max. | -0.18% |
| Crossload +3.3V/+5V max. | -2.72% |
| +5V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | +2.00% (22 mV) |
| 10% | +2.00% (23 mV) |
| 20% | +1.80% (22 mV) |
| 50% | +0.00% (10 mV) |
| 80% | -0.80% (12 mV) |
| 100% | -1.10% (14 mV) |
| 110% | -1.20% (13 mV) |
| Crossload +12V max. | +0.86% |
| Crossload +3.3V/+5V max. | -2.96% |
| +12V Regulation (Worst Rail)/Ripple and Noise (Worst Rail) | |
| Load | Voltage |
| 5% | +1.28% (9 mV) |
| 10% | +1.24% (8 mV) |
| 20% | +1.16% (7 mV) |
| 50% | +0.42% (35 mV) |
| 80% | -0.42% (30 mV) |
| 100% | -0.45% (28 mV) |
| 110% | -0.51% (27 mV) |
| Crossload +12V max. | -0.67% |
| Crossload +3.3V/+5V max. | +0.63% |
Noise Levels
| Sound Pressure Level (Ambient: 16dBA. 1m distance) | |
| Load | dB(A) |
| 5% | 18 |
| 10% | 18 |
| 20% | 18 |
| 50% | 20 |
| 80% | 23 |
| 100% | 27 |
| 110% | 31 |
Efficiency and PFC
| 115VAC. 60Hz | ||
| Load | Efficiency | PFC |
| 5% | 69.95% | 0.842 |
| 10% | 79.10% | 0.911 |
| 20% | 87.08% | 0.986 |
| 50% | 90.78% | 0.989 |
| 80% | 89.36% | 0.991 |
| 100% | 87.99% | 0.993 |
| 110% | 87.23% | 0.992 |
| 230VAC. 50Hz | ||
| Load | Efficiency | PFC |
| 5% | 76.42% | 0.810 |
| 10% | 80.36% | 0.840 |
| 20% | 87.52% | 0.970 |
| 50% | 90.87% | 0.982 |
| 80% | 90.04% | 0.985 |
| 100% | 89.80% | 0.988 |
| 110% | 88.17% | 0.990 |
As you can see we have two new tests. 5% is exactly half of the load we use at 10%, and it shows how the PSU performs below the 80 Plus loads (20% and more). In addition you can find crossload tests in the charts above.
Crossload tests are static loads where we try to put the PSU under stress with high current on 3.3V/5V and low current on 12V, or high current on 12V and low current on 3.3V/5V. Since most PSUs have a common forward converter the PWM-IC can only regulate one voltage while the other ones are coupled to the same control loop via resistors. (Usually +3.3V has its own mag amp or shunt regulator; -12V uses a transistor.) This is the reason why 12V is often too high when 5V is loaded with a low current and too low when 5V is loaded with a high current. An example: the control circuit has no reason to raise 5V with 1A load while 12V is at 20A load. 12V is very low now, e.g. 11.40V, but since these voltages have the same regulation, 12V won't be raised since 5V is the reference value.
At 5-20% load the fan is no quieter than the one from the HCP-1200, which was already silent and close to our measurement limit. Therefore the fan rotates somewhat slower at high load. In addition, there is no background noise, which is something we see in the air channels of an 80mm design. The bad thing is we always hear the ball bearing of the ADDA fan; Sanyo Denki would be a better choice here. At its peak nearly 91% efficiency can be achieved. The power factor is a maximum of 0.990. Ripple and noise is very low during all loads. It might look unusual that ripple and noise are higher at low load, but this is a typical result for the CM6901X IC and the resonant circuit. Overall the performance is great.
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buzznut - Thursday, October 27, 2011 - link
Wow, sorry to hear that but it kinda sounds like luck of the draw to me. I've used Antec products for quite a while and they've always been high quality.My Antec 650W Blue PSU has been doing well for 3 years and I expect it to continue for at least another 3, probably more.
I've always used WD hard drives, until I had a 500GB green drive fail on me. Now I am skeptical to give them another chance, much like you. I suppose I would give them another shot. On the other hand, the first Foxconn mobo I bought was a piece of crap and I won't bother with that brand anymore.
Trust is something I've always had in Antec products. However PSU dealers like Antec are dependent on the quality of the OEM manufacturer. So, yeah I agree that some of the better Antec and Corsair units have been Seasonic in origin.
SixOfSeven - Wednesday, October 26, 2011 - link
The original Seasonic X-series (X-650, etc.) used PWM fans. I believe the new ones (X-660, etc.) use non-PWM fans. Was the entire rationale for the "new" X-series products just to avoid paying royalties on yet another patent that should never have been issued?Martin Kaffei - Wednesday, October 26, 2011 - link
The new X-Series versions have an improved technology (better MOSFETs, some layout changes, larger heatsinks) too. So I wouldn't say they made new products just because they didn't want to pay for PWM.The Seasonic X-Series is great, since they use Sanyo Denki fans and a semi-passive cooling. Even if there is no more PWM the fan (and fan regulation) is still satisfying.
Btw. Corsair AX (X-750 design) has no PWM. There is definitely a patent for PWM fans in power supplies. Seasonic paid, Corsair not.
ishbuggy - Wednesday, October 26, 2011 - link
Nice article, but could you put captions on your photos? They are nice but not always clear what they are highlighting. Sorry for being nitpicky :PDeath666Angel - Wednesday, October 26, 2011 - link
Hey!Thanks for the review of this item (though I'm not in the market for that much power, prefer the 500-600W range which is sufficient for my single CPU/GPU configurations).
I am going to be buying a new PSU around Christmas and my two current favorites are the Seasonic X-560 or the new be quiet! Straight Power E9 CM. Are you going to be able to review the be quiet? It has a larger fan, is cheaper. The Seasonic has the advantage of being proven and semi-passive. I'd be interested to know how they fair against each other. :-)
buzznut - Thursday, October 27, 2011 - link
Couldn't find a review on the unit you're looking for but it sounds promising, hre's a review on its smaller 400 W sibling:http://www.jonnyguru.com/modules.php?name=NDReview...
Death666Angel - Thursday, October 27, 2011 - link
Thanks for that, but the review is of the E8, which is the predecessor to the E9 which has just been released. The E8 is just bronze/silver, whereas the E9 is all the way gold as far as I can tell. :-)sierraindigo - Wednesday, October 26, 2011 - link
Two references to HCG-750, which is (probably?) a different product.JarredWalton - Wednesday, October 26, 2011 - link
Oops... my bad in editing. High Current Gamer is definitely a different product, though I'm not sure if a 750W model exists. Anyway, I've replaced the references with the HCP. Thanks!buzznut - Thursday, October 27, 2011 - link
Yeah. high current gamer also by Antec. An easy enough mistake.