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PSU For High-End Gaming System

Last response: in Components
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April 19, 2010 4:02:03 PM

I'm in the process of building a new computer and i'm trying to decide on a PSU. Of all the components I probably know the least about PSUs and thus have a hard time determining how much power I need in a PSU.

System:
Case: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
MOBO: ASUS P6X58D Premium LGA 1366 Intel X58 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
CPU: Intel Core i7-930 Bloomfield 2.8GHz 4 x 256KB L2 Cache 8MB L3 Cache LGA 1366 130W http://www.newegg.com/Product/Product.aspx?Item=N82E168...
GPU: SAPPHIRE Vapor-X 100281VX-2SR Radeon HD 5870 1GB 256-bit GDDR5 PCI Express http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Memory: CORSAIR DOMINATOR 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

In addition: At least 2 harddrives, 1 dvd, 1 sound card, liquid cooling

How is this PSU, other recommendation?
CORSAIR CMPSU-850TX 850W ATX12V 2.2 / EPS12V 2.91 SLI Ready http://www.newegg.com/Product/Product.aspx?Item=N82E168...
a b ) Power supply
April 19, 2010 4:09:21 PM

The 850TX is a nice PSU, but it's more than your system needs. A quality 750W PSU is plenty. Here's a couple good options:

Antec TruePower New TP-750 750W 80 PLUS BRONZE Certified Active PFC Power Supply $119.99

CORSAIR CMPSU-750TX 750W 80 PLUS Certified Active PFC Power Supply $109.99 - $20 MIR

By the way, that RAM is very over-priced and not a good fit for your build. The Intel 9xx chips use a triple-channel RAM controller. You should get a triple-channel kit for the best performance. Here's an excellent kit:

G.SKILL PI Series 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7T-6GBPI $189.99
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a b ) Power supply
April 19, 2010 4:15:44 PM

I would recommend going for the XFX XXX or XPS series power supplies as they surpass Corsair's higher wattage counterparts in performance (750w+ which are CWT built)

XFX 750w silver 80 plus Modular power Supply based off Seasonic build.
This power supply is more then you need for the setup but the 750w will give you plenty of headroom for upgrades, and overclocking (did I mention it's cheaper then the Corsair 750w modular while performing better?):
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a c 248 ) Power supply
April 19, 2010 6:33:51 PM

Here are the official power requirements for the new ATI Radeon HD 5850 and HD 5870 video cards.


ATI Radeon™ HD5850 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard

500 Watt or greater power supply with two 75 watt, 6-pin, PCI Express® power connectors.

600 Watt or greater power supply with four 75 watt, 6-pin, PCI Express® power connectors for ATI CrossFireX™ technology in dual mode.


ATI Radeon™ HD5870 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard.

500 Watt or greater power supply with two, 75 watt, 6-pin, PCI Express® power connectors.

600 Watt or greater power supply with four, 75 watt, 6-pin, PCI Express® connectors for ATI CrossFireX™ technology in dual mode.

The power supply recommendations are for an entire pc system.

Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty.

I recommend the new Seasonic X650 gold certified power supply if you plan on adding a second video card for Crossfire mode:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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