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PS and CPU Fan questions on a $2000 build

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August 21, 2012 8:57:42 PM

Hello,

Below is the listing of the build I am considering. The questions I have that I hope to gain the community's assistance on are:

1. How big of a power supply will I need since I want to go with 2 -GTX 670s in SLI? The specs says at least a 550W for a single card. Does that mean I should double that for SLI? So, should I be looking at 1200W or bigger PSs?

2. Does that CPU cooler work for this configuration? Will it fit, or do you recommend a different one?

Thank you all very much for your assistance.


Build:
CPU.............................Intel Core i5-3570K 3.4GHz Quad-Core......................$189.99

CPU Cooler.................Zalman CNPS9500 AT Ball Bearing...............................$35.98
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Motherboard..............ASRock Z77 Extreme4 ATX LGA1155............................$134.99

Memory......................G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866...........$58.99

Storage......................Samsung 830 Series 256GB 2.5" SSD.........................$209.00 (I have a reason for a 2nd one)
...................................Samsung 830 Series 128GB 2.5" SSD........................$109.99

Video Card.................Gigabyte GeForce GTX 670 2GB..................................$399.36
..................................Gigabyte GeForce GTX 670 2GB...................................$399.36
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Sound Card...............HT Omega Claro Halo..................................................$199.99 (I have a need for an addon sound card)

Case.........................Cooler Master HAF 922 ATX Mid Tower........................$88.99

Power Supply...........Corsair 850W ATX12V / EPS12V..................................$144.99 (Do I need bigger?)

Operating System....Microsoft Windows 7 Home Premium SP1 (64-bit).......$90.72

Total: $2062.35
a b B Homebuilt system
August 21, 2012 10:10:32 PM

POWER SUPPLY REQUIREMENT FOR GRAPHICS CARDS
http://www.realhardtechx.com/index_archivos/Page362.htm
This lists manufacturer's recommended wattages for systems with the listed graphics card.

In the case of GTX 670 SLI Nvidia recommends a 750W PSU with four PCIe connectors.
Personally I think that a high quality 650W PSU is more than enough for a GTX 670 SLI system.

This is a good price atm and is better IMO than the Corsair HX850:
Rosewill Capstone-750M ($88 after promo code)
http://pcpartpicker.com/part/rosewill-power-supply-caps...

If you stick with the HX850, make sure you get the one that is marketed as 80 Plus Gold certified.

I can't see any reason why the cooler won't work.
Not sure if I'd choose that model for myself as most recent reviews for that design that I have read have shown that tower coolers from other manufacturers are both better at cooling and are quieter. But I haven't seen a review for that particular model, so I might be wrong about that one.
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a b B Homebuilt system
a b à CPUs
August 21, 2012 10:37:10 PM

nVidia itself recommend 500W for a single 670. Add 170W for SLI & recommended is 670W.
http://www.nvidia.in/object/geforce-gtx-670-in.html#pdp...


For testing conducted for SLI 670, the resulting system consumption for SLI is 433W of which 293W are attributed to the gpu cards.
http://www.guru3d.com/article/geforce-gtx-670-2-and-3wa...
I would get a 750W PSU this is a decent one http://www.newegg.com/Product/Product.aspx?Item=N82E168... as for your aftermarket cpu cooler i get something else maybe this http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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August 22, 2012 1:41:35 AM

Best answer selected by Kaillus.
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August 22, 2012 1:43:02 AM

Thank you both very much. Both of you gave great links for sites I didn't know about. I was on the nVidia site for awhile looking for PS info, but couldn't find what you shown me, I was looking at specific cards, not the overall one for the 670 series. I was on the Asrock site and several others. Again, thank you both very much!
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