Help me choose a PSU

By Sant ยท 9 replies
Feb 3, 2011
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  1. Im a little lost regarding the wattage I need, I used the newegg psu calculator but Im not sure about it

    Here are my specs

    GA-X58-USB3 motherboard
    EVGA GeForce GTX 570
    Curcial DDR3 6GB RAM

    I havent bought the case, the optical drive or the hard drive

    I like Coolermaster PSUs

  2. Route44

    Route44 TechSpot Ambassador Posts: 11,984   +72

    What cpu are you going to run?
  3. Sant

    Sant TS Rookie Topic Starter

    Sorry, its a i7 950
  4. Route44

    Route44 TechSpot Ambassador Posts: 11,984   +72

    Your cpu requires 130 watts.

    And per EVGA you need a minimum of 550 watt power supply with the 12 volt rail rating of 38 amps and 2 6 pin PCI-E power donagles.

    I'd be looking in the range of 750 watts.
  5. Tedster

    Tedster Techspot old timer..... Posts: 6,002   +15

  6. Ritwik7

    Ritwik7 TechSpot Chancellor Posts: 1,672   +9

    I'd agree with Route. A 750W and above will leave you with enough head room OCing. If budget is not an issue, go with a PSU that will allow you to add a second card in the future.
  7. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,443   +38

    Your PSU choice at this point is pretty much determined by your budget; as a rule of thumb, the higher your budget, the better the PSU you can get.

    "Better" defines a PSU with an 80 Plus Gold or 80 Plus Silver rating (versus lower-priced ones with an 80 Plus or an 80 Plus Bronze rating), modular cables, possibly a larger, quieter, higher-CFM (read: better cooling) fan and high-quality internal components for cleaner and problem-free power delivery, as well as a large warranty coverage period (5 years is usually standard for a high-quality PSU).
  8. pVk

    pVk TS Rookie Posts: 16


    Quality 750w with at least 58 on 12volt rail will insure you of a quiet operation.

    Make sure you buy a quality brand.

  9. Rage_3K_Moiz

    Rage_3K_Moiz Sith Lord Posts: 5,443   +38

    ^, 750W is unnecessary; a quality 650W PSU will be sufficient. I second the brand choices however. I think you also meant SilverStone instead of "silverone".
  10. R3DP3NGUIN

    R3DP3NGUIN TS Booster Posts: 152   +10

    Coolermaster Gold series and Corsair HX series, best PSU's in my opinion. I think Corsair HX850 is good value and has 70Amps on +12V rail. The coolermaster Gold 1000W isnt much more expensive and has 98Amps on +12V rail but may be overkill for your setup.

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