Power Supply Problem

[kinglou]

I been tinkering with PCs for a while now. I am process of slowly piecing together a gaming PC. I just bought this for my power needs:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182097

So I put my q6600, 9800gx2, 4 gigs of ram onto to a eVGA 680i and hook up the power. All appears to be running fine but the MB does a long beep and displays a 7F (Check POST error and display them and ask for user intervention) and no post message or anything on the screen. So I figure my 9800gx2 might of died so I grab my new 295 gtx and try, same thing happens,which is nothing, no post.

I do a quick google search on this and I find a thread saying that it might be his graphics card needing power. So I pull out my wife's 8500gt out of her computer and pop it in mine. Now the computer does one beep and I see the post screen finally!

So my question is..wtf? How can a 950w brand new power supply not power a modern day graphics card? But it can power the motherboard just fine? Is it RMA time?

EDIT: I should mention that both the 9800gx and the 295gtx both "power up" but I don't get the blue light that usually come on after a few seconds.

 

[shovenose]

did you connect the power connector for the card (6 or 8 pins), aka pci-e power connector?

 

[kinglou]

Yup

 

[shovenose]

hmmm...
your psu has 4 12volt rails. put the card on one, the mobo/cpu on the other, and the drives on yet another...

 

[kinglou]

Thanks for the replies Shov.

I am pretty sure I am doing this right though.

I got of the 12v rails going to the 9800gx2. The 24pin MB plug going into the MB. And I got the secondary MB plugged in to. Maybe the 12 volt rails are defective?

 

[jsc]

You need a better quality power supply. $110 for a 950 watt PSU is ridiculous. $110 is a good price for a high quality 650 watt PSU.

For an upper end X2 type of video card, I'd use one of these:
Corsair 750TX (60 amp 12 volt rail)
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006
http://www.hardwaresecrets.com/article/505

 

[shovenose]

also, you only have 20 amps per rail. go with a good quality corsair single 12v rail psu

+1 coprsair 750tx ^

 

[kinglou]

@JSC. Could this run two 295 gtxs?

Also, would this be a better fit?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139013

 

[shovenose]

Thats plenty. Can you return The rosewill one?

 

[kinglou]

Thats plenty. Can you return The rosewill one?

I put a RMA into newegg and they accepted it. I mean if it can't power a 9800gx2 but itself then there has to be something wrong.

Thanks for all the responses, I await my corsair now.