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View Full Version : when running two 7800GT how many amps needed


john19055
12-28-05, 07:35 AM
I am fixing to get a Epox 754 SLI board and run two Evga 7800GT's and it says it needs at least 20 amps on the 12v line and my 470watt OCZ powerstream puts out 33 amps on the 12 v line ,you think it will work okay.

Peoples-Agent
12-28-05, 08:13 AM
I think you already answered your own question, but as I always say....

Only one real way to find out.

Hope it works ok for ya!

skoprowski
12-28-05, 09:40 AM
I wouldn't chance it....go to Compusa and pick up and Antec 500w ps. It's on sale for $50.00 after rebate.

john19055
12-28-05, 03:10 PM
The antec 500w just puts out 3more amps on the 12v line then my does ,I think I will give mine a shot and if I have stablity problems then I will upgrade.The motherboad manual say if I run SLI it should have least 20amps on the 12v rail and I have 33amps.

Elfear
12-29-05, 08:55 AM
My 520W Powerstream also has 33A on the 12V line and it powers my 7800GTs just fine. I also have a waterpump, five .5A fans, and everything is oced. Your 12V line should be just fine.

Medion
12-29-05, 12:48 PM
33A is more than enough for two 7800GTs. The OCZ PowerStream is an excellent PSU.

nVidia recommends 26A single/34A SLI on their 7800GTX 512 and the 6800U, which are their highest drain GPUs. That's also worst case.

This is hard for some people to accept, but you don't need 1kw for SLI. In fact, a single 7800GT will run fine on a 350W quality PSU, as long as there's at least 20A on the 12V rail.

Tr1cK
12-29-05, 02:07 PM
Woot, good news to me! My Enermax has a lot of ass for a 460.