Is the PSU in this bundle any good?

Ok thanks. After reading the conclusions it looks like a bad idea getting one.

So what would you recommend for a 6950/570?
 
The Halk said:
It's decent. Don't listen to the PSU snobbery :)

Detailed review
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LOL at that review.

Performance (40% of the final score) - the Coolermaster GX-750 underwhelmed in just about every way possible. Regulation was only so-so, efficiency was remarkably lower than the 80 Plus test report would have us believe, and the 3.3V rail had more ripple than the last time I did a cannonball into a pool when I was still a three hundred plus pounder. To boot, the unit wouldn't even come close to full power at forty degrees before the overtemp protection came in and shut down the party. I dearly hope that Coolermaster's shipping retail units are better performing than my sample was, but since I couldn't get my hands on one of them I'll have to score this one as I see it. I have to do a 6 here I think.
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doesnt look to good really.
 
stulid said:
not really.

750w review - http://www.hardwaresecrets.com/article/Cooler-Master-GX-750-W-Power-Supply-Review/917

650w review - http://www.hardocp.com/article/2010/11/22/cooler_master_gx_650w_power_supply_review/
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The 750w review seems quite favourable :confused:

If you need a PSU and case and both interest you, it does seem a good deal. The PSU is from a reputable brand and not badly reviewed, so I can't see any problems personally, especially when you're very unlikely to take the PSU anywhere near full load.

750w review said:
Cooler Master GX 750 W can really deliver its labeled wattage at high temperatures.

Efficiency is decent for a mainstream product if you pull up to 80% of the unit’s labeled capacity (i.e., up to 600 W), between 80% and 84%. At full load efficiency drops below the 80% mark, at 77%. This unit is 80 Plus certified and as we have been exhaustively explaining in our reviews, Ecos Consulting, the company behind 80 Plus, tests power supplies at 25º C, while we test them between 45º C and 50º C, and efficiency drops with temperature. Therefore our tests are more rigorous (and more realistic) that those conducted in order to get the 80 Plus certification (click here to learn more). By the way, the 80 Plus website doesn’t list this power supply.

Voltage regulation was superb, especially for a mainstream product: all positive voltages were within 3% of their nominal values all the times. This is good because voltages are closer to their official values than allowed by ATX12V specification, which sets a 5% tolerance (10% for -12 V). The only exception was during test five, where +5VSB went a little bit out of this tighter range, but still within the allowed range.

The problem with Cooler Master GX 750 W was noise and ripple. During tests four and five noise level on +3.3 V and +5VSB outputs was higher than the maximum allowed (50 mV): 57.4 mV and 70 mV for +3.3 V during tests four and five, respectively, and 51.6 mV and 58.4 mV for +5VSB during tests four and five, respectively. Below you can see the screenshots from our oscilloscope during test five. The maximum allowed for +12 V is 120 mV. All these numbers are peak-to-peak figures.
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Not perfectly stable (bearing in mind this is an unrealistic real world test, but the PSU SHOULD still cope as it's what the specs etc are based on) but able to provide the voltages etc required. If you plan on running it at the limit and massively overclocking, it'll be a poor choice, but if you run a high end PC, even with SLI/Crossfire, you're unlikely to pull anywhere near 750w.

Yes, you can do better, but it's not a bad choice per se, maybe just not the best choice.
 
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jellybeard999 said:
The 750w review seems quite favourable :confused:
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You reading the same review?

Conclusions



Cooler Master GX 750 W looks like a good option for users looking for a mainstream 750 W power supply, however it has a major flaw that prevents us from recommending it: noise level at +3.3 V and +5VSB outputs were above the maximum allowed when we pulled 600 W and above from this unit. High noise levels overload and can even damage components on your computer.
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Its rubbish.
 
That conclusion is the thing that's putting me off it.

That XFX PSU looks good but that means splashing out an extra 17 pound for the same job...
 
stulid said:
You reading the same review? Its rubbish.
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I didn't get to the noise bit, just the voltage regulation and efficiency. I'd still maintain it's a reasonable PSU, just not the best. If you test most PSUs, they'll fail in a lot of the stress tests, unless they're very conservatively rated or overspecced - in most cases this means expensive.

How does the Antec fair? The last Antec I remember being any good was the True Power with the adjustable pots on the back and reading some reviews of the quattro PSUs (their high end) it seems they suffer excessive noise too.

At the end of the day, is he going to be pulling 750w? Very unlikely. 500w? Again, very unlikely. Most people seem to go for massively overspecced PSUs for no reason. I'm 99% certain it'll be fine for what he's after. So would a ~500w Seasonic/Corsair or similar though, which is what I'd suggest ;)
 
jellybeard999 said:
I didn't get to the noise bit, just the voltage regulation and efficiency. I'd still maintain it's a reasonable PSU, just not the best. If you test most PSUs, they'll fail in a lot of the stress tests, unless they're very conservatively rated or overspecced - in most cases this means expensive.

How does the Antec fair? The last Antec I remember being any good was the True Power with the adjustable pots on the back and reading some reviews of the quattro PSUs (their high end) it seems they suffer excessive noise too.

At the end of the day, is he going to be pulling 750w? Very unlikely. 500w? Again, very unlikely. Most people seem to go for massively overspecced PSUs for no reason. I'm 99% certain it'll be fine for what he's after. So would a 500w Seasonic/Corsair or similar though, which is what I'd suggest ;)
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Spot on.

If people listened to the PSU hysteria that goes on these (and other) forums then people would have £100 PSUs in £400 systems.
 
The Halk said:
Spot on.

If people listened to the PSU hysteria that goes on these (and other) forums then people would have £100 PSUs in £400 systems.
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I've just had a quick look at the OcUK range (been a while since I've upgraded at all, and my PSU will be fine for a good while yet) but WTF is it with the PSU wattages? 600w is the starting level? Unless you're going for quad SLI, this would do any PC - power consumption is on the whole going down not up. I'd be pretty sure a bare bones Socket A system for example would draw more power than an i7 system.
 
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