Corsair TX750 V2: New and Improved
by Martin Kaffei on May 16, 2011 6:55 PM EST- Posted in
- Cases/Cooling/PSUs
- Corsair
- PSUs
- 80Plus Bronze
- 750W
- TX V2
Voltage Regulation
| +3.3V regulation | |
| Load | Voltage |
| 10% | +1.21% |
| 20% | +1.00% |
| 50% | +0.72% |
| 80% | +0.43% |
| 100% | -0.30% |
| 110% | -0.38% |
| +5V regulation | |
| Load | Voltage |
| 10% | +1.20% |
| 20% | +1.16% |
| 50% | +0.85% |
| 80% | +0.60% |
| 100% | +0.29% |
| 110% | -0.40% |
| +12V regulation (worst rail) | |
| Load | Voltage |
| 10% | +0.75 % |
| 20% | +0.64 % |
| 50% | +0.40 % |
| 80% | +0.27 % |
| 100% | +0.11 % |
| 110% | -0.08 % |
All the rails fall clearly within ATX specifications. They start slightly over the target voltage and end with results close to 0%. Since this PSU has two 12V outputs, we selected the worst rail for the tables (which is our standard procedure). +12V shows the best regulation, and will have no trouble with higher voltages. -0.08% at overload is one of the best results we have seen.
Ripple and Noise
| +3.3V ripple quality | |
| Load | Ripple and Noise |
| 10% | 13mV |
| 20% | 14mV |
| 50% | 18mV |
| 80% | 22mV |
| 100% | 23mV |
| 110% | 25mV |
| +5V ripple quality | |
| Load | Ripple and Noise |
| 10% | 9mV |
| 20% | 11mV |
| 50% | 16mV |
| 80% | 18mV |
| 100% | 19mV |
| 110% | 21mV |
| +12V ripple quality (worst rail) | |
| Load | Ripple and Noise |
| 10% | 8mV |
| 20% | 12mV |
| 50% | 14mV |
| 80% | 26mV |
| 100% | 28mV |
| 110% | 33mV |
Both smaller rails have less than 30mV ripple and noise, making this PSU is as good as the Antec HCG if not better. +12V has higher absolute ripple, but it's actually closer to spec as a percentage. All of the rails are far away from the limit. The TX750 V2 can't beat the Corsair AX 750W, so we now know why there is such a high price difference. Of course 80 Plus Gold is another reason to buy an AX-series PSU.
Facebook
Twitter
RSS
32 Comments
View All Comments
Patrick Wolf - Tuesday, May 17, 2011 - link
Agreed on power savings not being worth it. But if Platinum gives you a cooler running (less heat inside the case) and mostly silent (cause the fan stays off most of the time) power supply, then to some those are very compelling reasons to pay the premium.Makaveli - Tuesday, May 17, 2011 - link
Agree Patrick,This is the same reason I chose the 750AX over this model the fan being off at low load makes the system so quiet it was worth it.
erple2 - Tuesday, May 17, 2011 - link
I don't know if Platinum could give you all that much in the way of a cooler case - it would, however, give you a cooler power supply. Modern PSU design has air from the case passing through the PSU and out the back of the PC.it doesn't matter (at least not at the differences between Platinum through 80+) whether the PSU really gets any warmer to the temps in the rest of the case, as it's all downstream of the airflow in the case, unless you reverse the fan direction to blow air into the case.
MeanBruce - Friday, May 20, 2011 - link
I have heard the Platinum rating would be 92% efficiency at 50%load. Also heard that it would be 90% at 20, 50 and 80% loads, so not sure which standard was decided upon. I have the Corsair AX850 Gold and the fan never spins up during idle and running office apps, even if you put a game on the Sanyo Denki fan is so quiet it must be 10 or 12db in the silent mode. Above 50% load only then does the fan speed increase to an audible level. Another great feature of both the AX750 and AX850 is that the internal heat sinks are bonded to the exterior housing, allowing the metal psu chassis to also dissipate the heat produced and allowing the fan to remain off. And going a bit further, when I mounted the AX850 in my new Corsair 650D the metal rear and side panels surrounding the PSU become warm over extended use, so the 650D chassis also acts as a heat sink, Corsair is Brilliant!;)casteve - Tuesday, May 17, 2011 - link
Thanks for the review, Martin.What was the ambient SPL at the time of the test (and could you please include it with future PSU testing)? As is, we don't have a point of reference. The room could be 25dBA ambient and the PSU is lost in the background...the room could be an anechoic chamber with 11dBA ambient, making the PSU a vacuum cleaner.
Martin Kaffei - Tuesday, May 17, 2011 - link
Your request will be taken into account. I can't say how much dB, but we are starting from 16 dBA when a PSU is turned off. The dB(A) measurements are an instrument to show the difference to the competitors and of course to underline the subjective results. Latter one depends on the frequency, side noises (usually at a low frequency which is why db(A) is not always the best solution here) and the guy who is testing. :)When I write the PSU is "relatively loud" e.g. it's a subjective opionen that the PSU is audible for me. So you can be shure it's louder than other sources of noise in the room.
Lithium466 - Tuesday, May 17, 2011 - link
"Corsair uses a 140mm fan from Young Lin with a ball bearing. The product number is D14BH-12 and it takes 0.70A."=> Yate loon fan, not Young lin.
Martin Kaffei - Tuesday, May 17, 2011 - link
thanksmepenete - Tuesday, May 17, 2011 - link
I've had excellent luck with Corsair powersupplies, even the lower end budget ones. I was really surprised after only knowing Corsair for memory but they make good products. Glad to see they're staying up that high standardcelestialgrave - Wednesday, May 18, 2011 - link
What ever happened to measure the exhaust heat like a couple of years ago?