Solved Will my PSU power this system?

October 1, 2011 at 18:08:03
Specs: Windows 7 ultimate 64bit, 4.082 GHz / 4087 MB
I am upgrading my system but I am unsure if my PSU will power the two GFX. I currently have a XFX HD 6970, I want to purchase a HIS HD 6970 to use it in crossfire. I want this model as it comes with two molex to 8 pin pcie convertors.

The specs will be:
Core i5 2500k
2 x 4gb g-skill 1600 RAM
1 HDD
HD 6970 (crossfire)

The power supply I am using is: http://www.ocztechnology.com/ocz-st...

Any information would be helpful to save some money :) thanks in advanced!

Also this is the power stuff/rails not sure what it means, just know it's important! http://www.ocztechnology.com/res/ma...


See More: Will my PSU power this system?

Report •


#1
October 1, 2011 at 18:48:52
Look for a PSU with a SINGLE +12v rail, NOT multiple.

Report •

#2
October 1, 2011 at 18:55:57
✔ Best Answer
The power supply has 4 separate 18Amp 12 Volt rails, this is not ideal for your set up, you would be better off with a single 12 Volt rail that carries ALL of the amperage, that way you would not have to worry what rail(s) the video cards are connected to. 8 pin PCIe adapters I believe join 2 molex plugs into one connector, but you would have to make sure that you choose connectors on different 'runs' to try to make sure you are using power from 2 different rails and not the same one or even the same rail(s) that the other video card is on. Too difficult to keep straight, IF it works, it may need many trials and errors of switching connectors around.
Try to wait until you can get a suitable PS.

You have to be a little bit crazy to keep you from going insane.


Report •

#3
October 1, 2011 at 19:00:28
Look at these instead:
http://www.newegg.com/Product/Produ...

You have to be a little bit crazy to keep you from going insane.


Report •

Related Solutions

#4
October 1, 2011 at 19:10:31
Thanks for this helpful information :) I will purchase my upgrades have a fiddle, if I get it working I will run some stability test to check it under loads. If I can't get it to work I will buy a new PSU, armed with my new knowledge to buy a single 12v rail PSU!

Report •

Ask Question