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What PSU do I need???

OK. Im building my first computer from the ground up. I plan on Crossfiring my 2 Sapphire 6950 Dirt 3 editions. I have a AMD FX-4170. 2 sticks of Corsair VENGEANCE (total of 8 GB). My motherboard is a GA-990FXA-UD3. A Seagate 160 GB @ 7200 rpm. A multicard reader(internal). 1 Samsung DVD writer (internal) I DO NOT plan on overclocking ANYTHING. Im scared of hurting my comp.
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  1. astroboy1985 said:
    OK. Im building my first computer from the ground up. I plan on Crossfiring my 2 Sapphire 6950 Dirt 3 editions. I have a AMD FX-4170. 2 sticks of Corsair VENGEANCE (total of 8 GB). My motherboard is a GA-990FXA-UD3. A Seagate 160 GB @ 7200 rpm. A multicard reader(internal). 1 Samsung DVD writer (internal) I DO NOT plan on overclocking ANYTHING. Im scared of hurting my comp.

    those 6950 DIRTS will need ~160 watts each
    the FX-4170 125 watts @ stock
    RAM 4 watts a stick
    motherboard 15 watts
    HDs, DVD drive and reader ~10 watts each (actually lower but i am rounding up)

    (160*2)+125+(4*2) +15 +(10*3)= 498 watts to keep the max load under 80% of the PSU 498/.8= 622.5 watts
    you do need FOUR six pin PCI power connections:
    XFX 650W PRO650W Core Edition $75.48
    After Mail In Rebate: $65.48 USD

    if you later decide to overclock, that can add ~75 more watts:
    XFX 750W PRO750W Core Edition $89.99
    After Mail In Rebate: $74.99
  2. Best answer
    Anonymous said:
    those 6950 DIRTS will need ~160 watts each
    the FX-4170 125 watts @ stock
    RAM 4 watts a stick
    motherboard 15 watts
    HDs, DVD drive and reader ~10 watts each (actually lower but i am rounding up)

    (160*2)+125+(4*2) +15 +(10*3)= 498 watts to keep the max load under 80% of the PSU 498/.8= 622.5 watts
    you do need FOUR six pin PCI power connections:
    XFX 650W PRO650W Core Edition $75.48
    After Mail In Rebate: $65.48 USD

    if you later decide to overclock, that can add ~75 more watts:
    XFX 750W PRO750W Core Edition $89.99
    After Mail In Rebate: $74.99

    Hmmm yah youre right about the PCIe Power connections. The Corasir only has 2
  3. astroboy1985 said:
    OK. Im building my first computer from the ground up. I plan on Crossfiring my 2 Sapphire 6950 Dirt 3 editions. I have a AMD FX-4170. 2 sticks of Corsair VENGEANCE (total of 8 GB). My motherboard is a GA-990FXA-UD3. A Seagate 160 GB @ 7200 rpm. A multicard reader(internal). 1 Samsung DVD writer (internal) I DO NOT plan on overclocking ANYTHING. Im scared of hurting my comp.

    I decided on a XFX 850 w psu
  4. Is that website good? Those prices seem too good to be true, lol.
  5. imrevned said:
    Is that website good? Those prices seem too good to be true, lol.


    not sure. Went with an amazon purchase. more options for a comparable price so Im pleased. XFX psu's are getting rave reviews so...check it out and recommend. I have a feeling I wont be let down.
  6. Best answer selected by astroboy1985.
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