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Need help choosing Power Supply for new build

Last response: in Systems
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October 21, 2011 7:53:18 AM

Hi all.

I need help choosing a power supply for a new build I am working on. Looking to do an mATX build in a small case.

CPU: Intel Core i5-2500K
MOBO: ASUS Maximus IV Gene-Z LGA 1155 Intel Z68
RAM: G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900)
GPU: EVGA GeForce GTX 590 (Fermi) Classified 3072MB 768-bit GDDR5
CPU Cooler: Corsair H60
or
Corsair H100 (If I can make it fit in the case)
SSD: Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)


And of course I will have an optical drive as well. And it will have 3 fans with the H60 or 4 fans with the H100.

My main question is will 650w be enough? Or will I perhaps need a 750w or even 850w? I used the Corsair AX750 for my current build and am planning on using the same series of PSU.
October 21, 2011 8:14:23 AM

The 750w will be better. The 650w is just risking it too much.
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October 21, 2011 10:20:28 AM

cutebeans said:
The 750w will be better. The 650w is just risking it too much.



yup, you should buy 750w psu.
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October 21, 2011 11:00:27 AM

A 700w PSU is recommended by Guru3D. You would probably be fine with a Corsair 650w unit, but to be on the safe side, 750w is probably the best choice. You at least then leave lots of headroom for Over-clocking and other hardware.
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October 22, 2011 12:29:22 AM

Ok thanks guys. So an 850 would be overkill?
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October 22, 2011 12:31:29 AM

Yeah 850w would be pretty much overkill.
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October 22, 2011 10:49:34 AM

cutebeans said:
Yeah 850w would be pretty much overkill.


Thats Right :) 
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October 22, 2011 12:21:44 PM

A gtx 590 in a mATX case? I wanna see that :D 
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October 23, 2011 1:51:58 AM

Lol. It should have no problem fitting in my new fractal design design mini once i remove the HDD bays. It would even fit inside my cheap-o 30 dollar broadway com corp case.
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!