New
#51
The video card specs and your PSU specs (on psu it's usually on a sticker on the PSU itself) should list the ratings for the amps for the 12v lines.
So if one card requires 22 amps, x2 means the PSU has to supply at least 44 amps (and some spare for other devices).
That probably means that each of the single video card power connectors is 20 amps. If you can only hook one to the card then the card will only get 20 amps total. If you can connect two you can then get up to 40 possibly (can sometimes be hard to tell how they wired those connectors internally)
Edit:
Looks like that card needs +12V rating of 26 amps. So if there is only a single power connector on those cards, then your current PSU is underpowered to run them at full bore. If you can connect two power connectors to each card then you should be ok...
Yes each card has its own 6 pin power connector (no splitters or anything)
Dont I add up all of the 12v to get the total amps? So it would be 80 amps total?
So each card is getting 20 amps?
Someone said this on the nvidia forums:
To get the total number of amps on the +12v rails, add all the digits.
The 9800GT needs at least 26A total on the +12V rail(s)
So even if both cards needed 52 amps total, I'm still well above that with my 80amp 12v rail correct?
Am I understanding this properly?
Well I could be wrong but I was under the impression that the full 80 amps is not available on all connectors...
But if what you read is correct then yes you are definately good.
Now I have to tear apart one of my spare PSUs to determine exactly if that's true or not
I cant say from my ownself, but like I said, it was from a member on Nvidia forums with about 8k posts (assume he knows what hes doing by now) and he said exactly: To get the total number of amps on the +12v rails, add all the digits.
Hopefully someone will come along and verify this.
I dont know what the other 12v cables are plugged into though? (I dont know if they are also 6pin like the two I have into each graphics card?)
So either way, I'm good to go right?
I did a lot of research when I first built this thing & this PSU was picked because it was going to be able to handle everything I wanted in a HTPC. Which included 4 monitors :)
I think so. I've gotten funny about power much like my stereo system more is better and great clean stable power is best. I wouldn't worry but be mindful of BSOD or frequent re-boots. I just recently went from 600 to 1050w on my PSU and I'm not running SLI yet.