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R600 Generation Power Requirements

post #1 of 21
Thread Starter 
Dear Abby,

I purchased my power supply thinking that I wouldn't have to upgrade it for at least 3 years. However, with the release of the nVidia GeForce 8800GTX, I noticed that it alone requires 2 PCI-E power connectors, so if someone were to want to run it in SLI, they would need a 4 PCI-E power connector PSU. My PSU, although well worth it's weight in gold, only has 2 PCI-E connectors. As I am anticipating purchasing an ATI card when the R600 versions come out, or perhaps the next version after that, I would like to know if they will require 2 PCI-E connectors per GPU as well... Any ideas?

Sincerely,
Hopeful that he won't have to buy a new PSU

P.S. What do you all think of the Enermax Galaxy 1000W PSU?
http://www.newegg.com/product/produc...82E16817194008
It seemed to have some problems with blowing up motherboards that has since been fixed. So ignoring that aspect, does anyone have reviews of it? It would seem to be my choice were I not to get the Quad Crossfire PC P&C 1000W PSU from Xoxide (which apparently has been discontinued?!):
http://www.xoxide.com/pcpc-1kw-turbocool-crossfire.html
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post #2 of 21
If the R600 draws about the same amount of power as the 8800 series, then you can just get two adapters (molex to PCI-E). The PSU you have is more than powerful enough.

I don't expect the R600 to draw much more power than the 8800.

I don't like the Galaxy too much, given it's division of current over the rails, leaving relatively not a whole lot for the video cards.

The best pick, while ignoring budget, is the current 1KW offering of PC Power & Cooling, which has the four connectors, and is also a SINGLE rail design (yeah! Good stuff!). But.. $550 or so.

Second best in my opinion is the 850W Silverstone. Also four connectors, and pretty darn powerful for about half the price of the PC P&C Beast
    
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post #3 of 21
That's some big capacitors.
    
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post #4 of 21
Dear Hopeful that he won't have to buy a new PSU,

I can answer your question about the PCP&C. The 1KW psu you are looking for can be found here. This is the best one available. Instead of the discontinued one at Xoxide, it is the newer version. The newer version has a single +12v rail instead of 3 rails.

Sincerely,
Abby
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post #5 of 21
72A.. single RAIL.. indeed.. nice caps
    
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post #6 of 21
Thread Starter 
Chozart!!! It has been so long since you've responded to one of my threads!!! I feel so privelaged!!!

I have always wondered about those adapters. Do you put them on two separate molex cables or will it work with two molex plugs on the same cable?

I don't see the benefit of having everything on 1 rail, especially since that option costs $110 more...
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post #7 of 21
Q: how many amps does each G80 take?
you give me the answer.
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post #8 of 21
Thread Starter 
If it's less than 16A overclocked then I've fine with the current PSU that I have.
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post #9 of 21
will my 550 watt sli ready power supply handle just one 8800gtx cause i have every intentions of odering one this weekend
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post #10 of 21
Quote:
Originally Posted by stargate125645 View Post
If it's less than 16A overclocked then I've fine with the current PSU that I have.
I belive it is closer to 18 or 20, so add those together and you get 36-40 and need that much on one rail, or two rails with 18-20 each.
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