PSU Question

kookooshortman55

kookooshortman55

New Member
You may want to use that second power supply to power up the second one if you can.

http://www.computerforum.com/90110-power-recommendations-video-card.html

Recommends 600W PSU with 48A on the 12V rail. Your power supply has 48A if not less. The video card won't use 48A, so you could probably get away with that PSU. If it's easy to set up though, might be good put in the second power supply, or just get a little bigger one to be on the safe side but it should work.
 
g4m3rof1337

g4m3rof1337

Active Member
Well, my friend can sell me a used PSU that powered his two 8800GTX's, but I have a few good/very capable power supplies laying around, as well as a PSU connector, that came with the case.




Thanks.
 
diduknowthat

diduknowthat

formerly liuliuboy
Don't use two powersupplies unless you set it up so that the powerbutton turns both on. It's a pain to reach around and turn on the PSU everytime, and you'd probably forget too.

Also, it looks like you'd be fine with that one PSU. It has plenty of power. But if you really want to be sure, you can also buy a 5.25" bay PCI-Express PSU to power the 2nd card.
 
hermeslyre

hermeslyre

VIP Member
I'm going to say you're close to pushing it, if you're thinking of OCing those cards. Unless one of the two PCi-e connectors pull off a separate (+12v2) line, unlikely, you've only got the single 24a for 2 8800gt, case fans, HDD's, etc.

Stock 8800gt's pull about 100-110w at load (8-9a +12v). 16-18a for both, leaving 8-6a left for everything else. A bit of non-modest overclocking might raise these numbers, to the point where you may only have 4a for the rest of the +12v suckers. Overcurrent protection would then probably kick in, shutting down the system when under load. Just a FYI, in case it ever happens.
 
g4m3rof1337

g4m3rof1337

Active Member
diduknowthat said:
Don't use two powersupplies unless you set it up so that the powerbutton turns both on. It's a pain to reach around and turn on the PSU everytime, and you'd probably forget too.

Also, it looks like you'd be fine with that one PSU. It has plenty of power. But if you really want to be sure, you can also buy a 5.25" bay PCI-Express PSU to power the 2nd card.
Click to expand...

When I got my Coolermaster case, it came with an adapter that connects two power supplies into one power connector, since the case itself has two power supply ports.
 
g4m3rof1337

g4m3rof1337

Active Member
CM Stacker:
PC031.jpg
 
kookooshortman55

kookooshortman55

New Member
Well you will most likely be able to run your system on that one power supply. But if you have an extra power supply with all the cable converters, you might as well. It's better to be on the safe side. The only con is the additional cable management.
 
Kornowski

Kornowski

VIP Member
Have you decided what you're going to do?

I've heard of people running and OC'ed Q6600 and two 640MB GTS' (Which use more power than the newer G92 GT and GTS) on my PSU (Corsair HX520). People tend to grossly over-estimate their power supplies. I'm going to run SLI and a Q6600 on my PSU.
 
hermeslyre

hermeslyre

VIP Member
Yours is a much better built PSU. Op has one +12v rail to supply his SLI cards, and all else (but the CPU) that pull from the +12v, while you have two. Apples to oranges danny. :D

HDD's may pull an amp or two, singly, from the +12v lines under certain conditions. Fan motors only a fraction of an amp, but that grows with numbers. The optical drive needs to be considered as well.. My math on the previous page, while maybe not as likely an occurrence as otherwise, I can still see it becoming a problem as it stands.
 
g4m3rof1337

g4m3rof1337

Active Member
Yeah, I plan on overclocking everything, a lot, so I want piece of mind, I also don't mind the second power supply, it'll fill the case up.




Thanks.
 
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