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Looking for a good PSU

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August 7, 2011 4:16:43 AM

I'm building a Sandy Bridge system. The components so far consist of a i5 2500k, Asus P8P67 Deluxe MB, 2 x Evga 460 GTS vid cards, optical drive, 2 drive RAID0 with an additional RAID configuration down the road, a 30w fan controller, a H50 CPU water cooler, and 7 fans in a Cooler Master HAF X 942 case.

Now I will admit I screwed the pooch on a PSU selection that I'm stuck with now. It is a Kingwin Lazer 1000w. It's crap. It constantly cuts out on me and powers backup. Didn't realize how crappy it was until I did a lot more digging after problems started when I OCed my CPU and vid cards. Seems it's not for high performance or OC. So looking for suggestions on a modular PSU that supports my requirements now and future RAID and full water cooling in the near future.

Thanks for the recommendations.

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a b ) Power supply
August 7, 2011 4:22:29 AM
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August 7, 2011 4:37:32 AM

I haven't really done the math on what wattage/voltage I would need for now and future with the over clocking. I just knew a 1000w PSU would be more than enough. Do you believe a 750w PSU will be enough for what I have in my system now and the future RAID1 I 'm going to add and a full water cool system? I know you listed a 850w PSU but as new products good, I hate testing new products. There is a budget but it could possible be lifted for something of quality. All the ones you listed are in the price range that the crappy Kingwin I bought was listed. Thanks for the help.
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a c 144 ) Power supply
August 7, 2011 4:57:37 AM

A pair of 460's will pull about 20 - 24 amps at peak load. That's 240 watts peaking to about 300. Figure 10 amps (120 watts) for the CPU. Figure 100 watts for the rest of the system.

That's a high side estimate of about 500 - 520 watts. A good 650 watt PSU would do, but it probably wouldn't have the necessary 4 PCIe power cables and it would be operating at more than 80% of capacity.

A good 750 watt PSU has the required cables and would do nicely.

I would use an 850 watt PSU. But I tend to overspec PSU's for my machines. I prefer to operate a power supply at 50 - 60% 0f capacity.
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a b ) Power supply
August 7, 2011 4:59:44 AM

All of them are high quality units that can pull more than its rated wattage (not wise to keep it that way for long periods of time). I doubt your system, even with watercooling, will break really more than 550w's under normal usage.

All are quality units, but if you want to step higher, then look for
Seasonic X850
Corsair AX850
Corsair HX850
XFX Pro 850
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August 7, 2011 6:56:16 PM

Thanks for all the responses. Out of the list, I'm looking at the Corsair HX 750. Mainly because I may not have to order it. There's a Compusa store an hour away that has it in stock. So I assume I can't go wrong with the HX 750 for my over clocking (CPU/GPUs) and the addition of a full system water cooling? Just checking before hitting the road.


Also, anyone want a Kingwin paperweight? :pt1cable: 
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August 7, 2011 8:56:42 PM

Thanks for all the responses. Out of the list, I'm looking at the Corsair HX 750. Mainly because I may not have to order it. There's a Compusa store an hour away that has it in stock. So I assume I can't go wrong with the HX 750 for my over clocking (CPU/GPUs), 5 HDs, fan controller, and the addition of a full system water cooling? Just checking before hitting the road.

I went to the Corsair site and used their Power Supply Finder. After inputting my requirements, it said I would need a PSU with 850W. Should I ignore than and stick with a 750W PSU?


Also, anyone want a Kingwin paperweight? :pt1cable: 
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August 8, 2011 1:42:18 PM

Best answer selected by silent54.
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a b ) Power supply
August 8, 2011 2:38:10 PM

This topic has been closed by Mousemonkey
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