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PSU dilemma

L

lamere

Senior member
Just got my crossfire card, sys. requirements are 550W/38A - I have 600W/35A on dual 12V rails.
Should I even attempt it or are thos power requirements pretty much law and wait till I get another PSU?

:sad:
 
Well the stumper is that the PSU's on this page - some of the 600W if not most are less in specs than mine, keep in mind I dont really know anything about PSU's 😱
looking at the x1900 chart at the top- http://www.ati.com/technology/crossfire/buildyourown2.html
A couple are not pushing more than 400W and they are crossfire certified? 😕

And this is my PSU specs
http://www.enermax.com/english/product_Display1.asp?PrID=42
Hmmmm......i dont know what to think, maybe i'll give ATI a call tomorrow just to verify- i'd rather spend the money on a gigabyte case 🙂

Thanks all 🙂
 
Bumparoo for the day crew

What's the worst thing that could happen if I hooked this up and it DIDN'T work? :skeptical:
I had to get a new PSU just to run the other x1900xt card because the PC wouldn't boot.
I hope that would be the case this time and something doesn't blow up :laugh:
 
It'll be fine. For example.

Each CF card takes 10 amps. The cpu may take 10 amps. AMD. So around 30 amps. The rest 5 amps may depend on how many hard drives you have. It'll work though.
 
600W, 35A combined on 12v rails.
http://www.legitreviews.com/article/348/5/

And it works with Crossfire X1900/Pentium D 965.
You should be safe enough.
(And remember the power consumption numbers are done at the outlet, so you need to factor in efficiency to work out the systems actual power consumption - which will be lower than the numbers they show)
 
The graphics card draws more current when under load. The worst thing that can happen is that when you stress the cards, by running a benchmark or when gaming, the application may freeze or crash to desktop or even reboot if your PSU cannot provide enough current resulting in a drop in the 12V rail voltage.
 
I can't find any reviews of this PSU and crossfire, it's SLI certified but ATI cards draw quite a bit more power than nVidia if i'm not mistaken.
I'll give it a shot I guess
Hopefully the worst thing that can happen is that it might not boot and not take the house out :shocked:
 
You're fine, unless the rail that the PCIe plugs are powered from happens to be limited at ~18A or less, or that rail also handles mobo and drives, in which case 20A would be a safer number. No harm in just trying, though.
 
ATI cards have a feature which tells you if they do not recieve enough power. This feature also makes the cards go in to a low-power mode. So it will be safe for you to try.
 
Originally posted by: lamere
Originally posted by: Lyfer
Sell your PSU to me and get the OCZ gameXstream.🙂
Click to expand...

Great moogawooga thats an expensive PSU :shocked:
Click to expand...

I snagged a almost brand new 600w for like $75 🙂 You can get the 700w verson for like $130 I think. And this is one item I never put a price tag on, because if this fudges up, it'll fudge up your entire system (or could). Never cheap out on the psu ^^
 
Well I took a shot and it works, and doesn't seem to have any problems, at least I have a display 🙂
For some reason the latest ATI drivers wouldn't install correctly, maybe I'll try again later. The drivers on the disk DID install (yay) but I have yet to see what version they are.
Thx everyone, not it's time for corn flakes 🙂
 
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