Enough Power For 8800GTS??

Sparky · Post by **Sparky** » Sun Mar 18, 2007 8:33 pm

I'm thinking about upgrading to a e-GeForce 8800GTS 640mb via the EVGA step up program. I am running a Raidmax 630w that specs at 18a on the 12v. EVGA says needs 26A on the 12v. I have D975XBX2 with extra molex plugged in to mobo (instructions say this is for PCI-E cards in excess of 75w along with PCI-E power connector). See people running with less power than I am and the question is will my PS support it?

dgood · Post by **dgood** » Sun Mar 18, 2007 8:48 pm

you could try it, i have a friend running one on a crappy aspire (yes I said aspire) power supply and his runs fine. Though a new better psu wouldn't be a bad thing. If it works, then I guess you can upgrade the psu a little further down the road.

Post by **dicecca112** » Sun Mar 18, 2007 8:55 pm

absolutely not. Why run the risk of frying your components, when you PSU gives up the ghost and frys everything in your system?

Power means nothing. Amps is everything. That's 8amps short, not just video cards draw from that line.

Sparky · Post by **Sparky** » Mon Mar 19, 2007 5:54 am

Ok, so now I'm really confused. One for one against. I was under the impression that the total 12v rail amperage equaled 35A (18A, 16A, 1A) so I'd have enough to run it.
Kind of hate to upgrade PS right now since I just bought the Raidmax RX-630A two months ago when I built my new system, but I dont want to damage anything if I am wrong about this. Stable on the 12v rail @ 12.375 even with OCing CPU and GPU.

Mad_Goku · Post by **Mad_Goku** » Mon Mar 19, 2007 6:48 am

Well does your 12V rail = 35A or 18A? You've said both. You'll be fine if it's 35....not if its 18.

Post by **dicecca112** » Mon Mar 19, 2007 7:00 am

Stable on the 12v rail @ 12.375 even with OCing CPU and GPU.

that would be bad if it were overvolting like that, but I doubt it is seeing I doubt you took that measurement with a multimeter, and most likely used software which is 99.99% of the time utterly wrong

Sparky · Post by **Sparky** » Mon Mar 19, 2007 3:18 pm

True, like dicecca112 said, I'm relying on Intel Desktop Utility to provide voltage measurements.
With regards to Mad_Goku, I am trying to understand if it is the total of ALL 12v rails (35A) or the measurement of the highest 12v rail (18A).

Post by **dicecca112** » Mon Mar 19, 2007 3:21 pm

total. But that is assuming the Raidmax has rail sharing, meaning if one rail is maxed out and another rail is not, then that power goes to the other rail. I doubt it, they don't usually do that on the cheapies

Sparky · Post by **Sparky** » Mon Mar 19, 2007 7:09 pm

Guess I didn't think it was a 'cheapie'..... it is a name brand as opposed to house brand, had read some good reviews about stable voltage with it and nice cables. Set me back just under $100. Before this one I used Antec True Power 2.0 450w, but PS calculator showed me needing more with my old AMD system so I upgraded both to the Raidmax -RX630A.
Any recommendations on good PS with enough amperage on 12v rail??

Post by **dicecca112** » Mon Mar 19, 2007 7:14 pm

http://www.newegg.com/Product/Product.a ... 6817139001

also do me a favor get me the UL file number off the PSU. That way I can look up who actually makes the PSU. In this day and age with the huge draw the Vid Cards have on a PSU, I wouldn't buy anything that has less than 50A on the 12V. It just doesn't make sense.

Sparky · Post by **Sparky** » Mon Mar 19, 2007 7:52 pm

Thanks for the tip and the link. Good price too. Should have bought that one for $20. more than I paid. Where do I find the UL file number for the Corsair PS you recommend?

Post by **dicecca112** » Tue Mar 20, 2007 6:34 am

no I want the UL for the Raidmax