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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34 Comments
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cjs150 - Wednesday, October 26, 2011 - link
"Antec has patented the use of PWM fans in PC power supplies"And some patent office granted it? Has the world gone mad...patents should only be granted for matters which are innovative and non-obvious. Use of PWM fans in power supplies is completely obvious.
On that basis, I am not buying an Antec power supply. Fortunately there are plenty of other equally good makes
Metaluna - Wednesday, October 26, 2011 - link
*Hopefully* it's a misprint and they just patented some specific PWM control circuit or something, but I'm not optimistic.Oh well, I'm off to patent the idea of replacing the processor in a computer with a faster one.
Rick83 - Wednesday, October 26, 2011 - link
Didn't someone else patent 140mm fans in PSU's, which is why people marketed their 140mm fans as 139mm?Funny nobody patented the fact of putting a fan on a PSU in the first place...
piroroadkill - Wednesday, October 26, 2011 - link
I have a weird feeling it was Zalman, but I'm not 100% on that.slacr - Thursday, October 27, 2011 - link
It's HEC, http://www.hec-group.com.tw/power_supply/ who also owns Cougar.Mumrik - Wednesday, October 26, 2011 - link
"Antec Antec" in the headline and then "Anctec" in the first line....Mumrik - Wednesday, October 26, 2011 - link
"Anctec" is only on the frontpage....Martin Kaffei - Wednesday, October 26, 2011 - link
Fixed! Thanks a lot.marvdmartian - Wednesday, October 26, 2011 - link
before I will trust an Antec PSU in a system again.In 10+ years of building systems, I have had two times where I had a power supply failure, that took out other components at the same time. Believe it or not, it wasn't back in the Powmax days, either.
Both times, Antec PSU's fried, and took out my motherboard with them. Shoot, if I had wanted that kind of performance, I would have kept the Powmax PSU in the case!
Trust is earned, Antec......and you have not done so. Think I'll stick with Corsair, for now.
piroroadkill - Wednesday, October 26, 2011 - link
Some Corsairs are made by Channel Well, the exact OEM that made plenty of Antecs several years back. Though, really, the problem was the Fuhjyyu capacitors. They were absolute garbage and used in a lot of Channel Well designs, including lots of Antecs.When you see the inside of a Channel Well, it's usually obvious, because they use this green crinkly tape around the transformer.
I go to the desired source and buy Seasonic power supplies. Although I do have a Corsair HX520 which is Seasonic built.
I just bought myself a Seasonic X-660. It was costly, but I don't want to fuck about when it comes to power supplies... and it does have a Sanyo Denki fan ;)