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
Noise Levels
| Sound Pressure Level | |
| Load | dB(A) |
| 10% | 24 |
| 20% | 24 |
| 50% | 25 |
| 80% | 32 |
| 100% | 36 |
| 110% | 38 |
The TX750 won't be a great fit if your goal is to create a silent or near-silent PC. On the other hand, the higher noise levels generally correspond directly with airflow, so this PSU should help reduce temperatures in your PC, which is especially important for SLI or CrossFire setups. We would still like to see less noise at low loads, since 75W output means there shouldn't be much heat to deal with. As usual, the fan rotates at full speed during overload and is close to 40 dBA. Most computers should not reach this level, but it is good to know that this PSU is still not the loudest one—we have seen worse results on other PSUs.
Efficiency and PFC
| 115VAC, 60Hz | ||
| Load | Efficiency | PFC |
| 10% | 79% | 0.926 |
| 20% | 85% | 0.950 |
| 50% | 86% | 0.980 |
| 80% | 84% | 0.988 |
| 100% | 84% | 0.991 |
| 110% | 83% | 0.992 |
| 230VAC, 50Hz | ||
| Load | Efficiency | PFC |
| 10% | 81% | 0.890 |
| 20% | 86% | 0.924 |
| 50% | 88% | 0.930 |
| 80% | 87% | 0.955 |
| 100% | 85% | 0.973 |
| 110% | 84% | 0.975 |
Note the difference the power grid makes.115VAC means higher current and more stress for all power supplies, while 230VAC shows a worse power factor at all loads. Nevertheless, 0.890-0.975 PFC is very good and most users will find 86-88% efficiency more than sufficient. While it doesn't quite make 80% efficiencey at 10% load, it is a good 80 Plus Bronze PSU for sure. With a low input voltage power factor is always over 0.90.
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tomoyo - Monday, May 16, 2011 - link
It's definitely a pretty big improvement, this has been discussed on some other review sites such as jonnyguru. The TX750 v2 is a good seasonic design, the old TX750 is an older cwt design that was not a great performer. This is an awesome budget psu.JarredWalton - Monday, May 16, 2011 - link
I linked in our old TX750 review for comparison; this is a much improved product.Patrick Wolf - Monday, May 16, 2011 - link
So is this review suggesting that it not being a single rail as being a bad thing? Or just that it's specs are incorrect? I mean it's better this way. If it were single rail, the amperage on the +12V would be to high and OCP wouldn't be included, splitting the rails allows for this additional protection. Corsair shouldn't lie to the customer, but I understand why they would as most people still think single rail is superior. At least they're not claming it's multi-rail when the rails are actually combined.Martin Kaffei - Tuesday, May 17, 2011 - link
Just the specs, basically there are no disadvantage for customers. Otherwise the conclusion would have been worse for Corsair. It's still a good PSU.Guspaz - Tuesday, May 17, 2011 - link
No disadvantage, except that consumers now need to worry about balancing rails. Single-rail designs provide the huge benefit of obviating consumers of the need to worry about if they've put too much stuff on one rail instead of the other.Martin Kaffei - Tuesday, May 17, 2011 - link
Nobody needs to worry about the loads. There are just as many connectors as a rail is able to provide. Even if Corsair wants to change something with the configuration the engineers take a look at it first before they sell a single product.erple2 - Tuesday, May 17, 2011 - link
I think there's plenty of research that suggests that a high quality multi-rail PSU is just as good as a high quality single-rail PSU.There are a few exceptions where a single-rail PSU is "better", but that generally refers to instances where you are running a LOT of devices that feed off the 12V rail (10's of harddrives, fancy cooling, 3x+SLI or 3x+ CrossFire, etc).
The other part, however, (truth in advertising) is very important. If' it's a single rail PSU, advertise as such. If it's really a multi-rail PSU, advertise it as such.
Erbadios - Monday, May 16, 2011 - link
That is odd...My manual states that the version 2 of TX 650, 750 and 850 comes with a 140mm fan.
My TX650 v2 does seem to have a very large fan, but i didn't open it to acually check...
So far i like it a lot, it's somewhat quiet. I wonder if the 750TX differs a lot from the 650TX, though..
MeanBruce - Monday, May 16, 2011 - link
The smartest choice you can make is to just wait until this summer when the Corsair Professional Series Platinum debuts. Sure they cost more but well worth it over the 7year warranty period in energy savings alone!;)JarredWalton - Monday, May 16, 2011 - link
Just to do the math:Bronze vs. Platinum: 85% vs. 91% (give or take)
Assume an average daily load of 150W (idle most of the time), and we'll even let the system run 24/7. That works out to:
Bronze: 1547 KWh per year
Platinum: 1429 KWh per year
Assuming $0.10 per KWh, you would save $11.80 per year.
If you actually leave your PC on 24/7 and draw 150W or more, I suppose it could be worthwhile to upgrade to Platinum. Realistically, though, I think Bronze/Silver is more than sufficient. Just my opinion, though.