/ Sign-up
Your question

GTX 260 power question

  • Nvidia
  • Gtx
  • Power
  • Graphics
Last response: in Graphics Cards
April 17, 2009 8:11:59 PM

I have a 550W PSU from Chieftec. It has three 12V rails, 18A each (3×18=54A). Now I want to buy a Geforce GTX 260 that requires a 500W PSU and 36A power on 12V. I suppose my PSU will be fine, these 12V rails should self adjust ?? Funny thing is, the PSU only has one PCI-E cable with two 6-pin connectors.

More about : gtx 260 power question

April 17, 2009 9:06:37 PM

It should work with your current power supply, just be aware the card is atleast 10.5 in long, having more than one 12v rail can be a bit unstable, i just have one 60A rail.
April 17, 2009 10:47:27 PM

It should work, but bear in mind that 3 18A rails do not necessarily give you a total of 54A. Generally, this is just the maximum amperage one of those rails can handle. My PSU has 3 16A rails, but if you read the sticker more closely, the max output across all three is only 32A (not the combined total of 48A).

As I said, it oughta be OK, but you'd do well to check the sticker on the PSU again and see if it gives you a total output across the 12v rails - if it follows the same pattern as mine, it should come to exactly the 36A you need, which would be cutting it a little close if you have a lot of other stuff in our system.
Related resources
April 17, 2009 11:03:14 PM

Combined power on 12V is 360W. Since GTX260 draws maximum 182W, it should work.
April 18, 2009 10:13:41 AM

Just bought the card and it works. Thank you all. :D