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Which PSU should I choose?

I am currently struggling between 2 PSUs

This COOLER MASTER Silent Pro Gold Series 1000w

or SeaSonic X Series X-850

the Cooler Master PSU is comboed with a HAF 932 Advanced Case ( which I am planning on buying) and will be $41 less than if I buy the SeaSonic

I want to get the SeaSonic because it is such a reputable brand on the internet. but I'm not sure whether 850w will power my rig.

I currently have no budget restrictions so I can afford either one of the PSUs

here's my setup:
Mobo: ASUS P8Z68-V PRO
CPU: i5-2500K ( Planning on overclocking, but no more than 5.0GHz
GPU: HD6950 Crossfire (2 of them)
RAM: G.Skill Ripjaw-X 8GB DDR1333 CAS 7
HDD: Samsung Spinpoint F3 1TB 7200RPM
5 answers Last reply Best Answer
More about which choose
  1. Best answer
    Either power supply will have no problem powering a system with two Radeon HD 6950 graphics cards.

    I would choose the Seasonic X-Series 850W (X-850) because of its much better DC Output quality.

    The Cooler Master Silent Pro Gold Series 1000w (RS-A00-80GA-D3) has high ripple just barely within specs.
  2. but would 850w be enough power for my computer?
  3. The Seasonic is definitely an excellent unit and I agree with everything ko888 said. It does pain me how expensive it is, though. Either of these will power your rig just fine for a fair bit less, and both are highly reputed/rated:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139016

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010

    A *quality* 600w unit can run 2x 6950s stock, and a quality 700w unit can run them unlocked (not sure which versions) and overclocked to the max. Both of the above are quality 750w modular units.

    Edit: Accidentally submitted too soon. Please excuse the unsolicited advice, and know that the Seasonic PSU is top quality:)
  4. The Seasonic X 850 is one of the best psu's that you can really buy. Highly stable, highly efficient, and can actually put out its rated and unrated output nearly always above 80% efficiency.

    As ko stated, the CMPSGS psu has higher ripples and is lower quality than the seasonic. When choosing a psu from a company that builds nearly everyone elses top psu's and a company which is a hit or miss depending on their model... I know which one i prefer.
  5. Best answer selected by Foverosiv.
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