850HX for mulitiple GTX 580's

[matt_griff]

Hi, I already have 1 gtx 580 and im looking to add a second in sli.
my psu is a corsair 850HX would this be ok to use or would I need a better psu aswell.

 

[mattjd]

Should be fine as long as you dont overclock and have a load of HDD's.

 

[matt_griff]

Ok new psu it is then as I'm overclocked to 4.8Ghz and I will have a total of 5HDD AND 1SSD.

what psu would you recommend?
Baring in mind I will be adding a 3rd 580 in the summer.

 

[fordypaul]

I have the same PSU but not that load, From when I purchased it it should easily power with the modular 8pin leads supplied = SLI plus the sysem

 

[matthab]

Itll be fine and if it isnt just buy a new PSU if it isnt.

It chucks out 70amps on a single rail which will be more than enough. Ive just ordered one my self to load up with Crossfire in the summer.

 

[mattjd]

Ok new psu it is then as I'm overclocked to 4.8Ghz and I will have a total of 5HDD AND 1SSD.

what psu would you recommend?
Baring in mind I will be adding a 3rd 580 in the summer.

If you're planning to go Tri-SLI in the future you might as well purchase a new PSU now.

Either of these two:

http://www.overclockers.co.uk/showproduct.php?prodid=CA-040-BQ&groupid=701&catid=123&subcat=1083

http://www.overclockers.co.uk/showproduct.php?prodid=CA-029-CS&groupid=701&catid=123&subcat=1084

 

[drifting]

As of my own measure, the wall meter shows 307W for my 4.5GHz i3 530 + single GTX580 running 3DMark Vantage. It's not guaranteed to be accurate, just for reference. imo 850W should be sufficient for 2-way 580 SLI but it'll be close to the edge.

 

[RJC]

Did mine the other day with Furmark and Prime running I was pulling 500w from the mains.

Spec in sig.