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750w psu is not enough for 2900xt?

post #1 of 6
Thread Starter 
Just bought a new system, i got 2x2900xt cards and thermaltake w0117 750w psu. Tought that thist psu would be enough for my system, but it isnt, it cant even power up my system with only one card and no hdd's connected.
I think i try Hiper HPU-4M670-EU 670W, it has lower amps at 12v line, but it is recommended for 2900xt crossfire system by ati and it costs as mutch as thermaltake 750w psu.
What do you guys think, can this hiper psu power up 2900xt crossfire system?

Sorry if my english is not good, or is hard to understand
post #2 of 6
Quote:
Originally Posted by olku View Post
Just bought a new system, i got 2x2900xt cards and thermaltake w0117 750w psu. Tought that thist psu would be enough for my system, but it isnt, it cant even power up my system with only one card and no hdd's connected.
I think i try Hiper HPU-4M670-EU 670W, it has lower amps at 12v line, but it is recommended for 2900xt crossfire system by ati and it costs as mutch as thermaltake 750w psu.
What do you guys think, can this hiper psu power up 2900xt crossfire system?

Sorry if my english is not good, or is hard to understand
Estonia? Isn't that where Encino Man is from? Your psu should work with the cards. What exactly is the issue? What happens when you try and power up? Are there any beeps from your mobo?

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Project Unamed
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post #3 of 6
Holy Crap
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post #4 of 6
Try and find something with one 12v rail instead of multiple ones.
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post #5 of 6
Thats so weird. I would think that Tt 750 watt would be plenty.
post #6 of 6
The only thing I can think of is with those 4 12v rails with 15 amps on each rail I think, maybe you had one overloaded without knowing it.
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