As the title says, what power supply should I use?
 
Here are my system spec:
 
i7 990x OC'd to 4.6 Ghz @ 1.4v
Crucial 128 Gb SSD
WD VelociRaptor 10000 rpm 600 Gb  HDD
1 DVD re-writer optical drive
2 water pumps
2 GTX 570 SC (1572-AR)
 
I currently have 2 GTX 570's but Im looking at picking up a 3rd. Before I do so, Im wondering what is the minimum size of the power supply I need for a tri-sli GTX 570 set up.
 
I currently have access to 2 corsair AX1200's, 1 corsair AX750, 1 Corsair HX1050. Im hoping the HX1050 will be enough but if not will the AX1200 work for the cpu OC and the GTX 570?
 
I am planning on over clocking the video cards as well.

go with the ax1200 great psu. you need it

JaskarnSidhu


As the title says, what power supply should I use?

Here are my system spec:

i7 990x OC'd to 4.6 Ghz @ 1.4v
Crucial 128 Gb SSD
WD VelociRaptor 10000 rpm 600 Gb  HDD
1 DVD re-writer optical drive
2 water pumps
2 GTX 570 SC (1572-AR)

I currently have 2 GTX 570's but Im looking at picking up a 3rd. Before I do so, Im wondering what is the minimum size of the power supply I need for a tri-sli GTX 570 set up.

I currently have access to 2 corsair AX1200's, 1 corsair AX750, 1 Corsair HX1050. Im hoping the HX1050 will be enough but if not will the AX1200 work for the cpu OC and the GTX 570?

I am planning on over clocking the video cards as well.

 The AX1200 is clearly the superior unit and the best choice.

Thanks McMada and Heavy.
 
I knew one AX1200 would be sufficient but I thought I might be able to get away with the HX1050. I know one GTX 570 requires a minimum 550 W but thats probably at stock settings without any OC on the cpu or VGA.

i ran almost the same system back in the day on a coolermaster silent pro 1200w and it performed perfectly (my 990x was clocked alittle higher) im not sure how it compares price wise to the corsair but id recommend either

The HX1050 would suffice, seeing as how GTX 580 Tri-SLI peaked at 933W in this review, and GTX 570s use quite a bit less power.
 
http://www.guru3d.com/article/geforce-gtx-580-3-way-sli-review/14
 
The AX1200 is a slightly better PSU in performance though, but either one would suffice.  
 

Phillsta
 

i ran almost the same system back in the day on a coolermaster silent pro 1200w and it performed perfectly (my 990x was clocked alittle higher) im not sure how it compares price wise to the corsair but id recommend either 

 
 
The Silent Pro Gold 1200W generally costs much less, but its ripple voltage on the +12v rail is near ATX limits.  As the years go by, its performance will deteriorate and its ripple might just go past ATX limit.  Either way its higher than I would like, though it poses no immediate danger to hardware.  It's also supposed to be very loud unlike the AX1200.  

boredgunner


The HX1050 would suffice, seeing as how GTX 580 Tri-SLI peaked at 933W in this review, and GTX 570s use quite a bit less power.

http://www.guru3d.com/article/geforce-gtx-580-3-way-sli-review/14

The AX1200 is a slightly better PSU in performance though, but either one would suffice.  

Phillsta
 

i ran almost the same system back in the day on a coolermaster silent pro 1200w and it performed perfectly (my 990x was clocked alittle higher) im not sure how it compares price wise to the corsair but id recommend either 

 

The Silent Pro Gold 1200W generally costs much less, but its ripple voltage on the +12v rail is near ATX limits.  As the years go by, its performance will deteriorate and its ripple might just go past ATX limit.  Either way its higher than I would like, though it poses no immediate danger to hardware.  It's also supposed to be very loud unlike the AX1200.  

Oh I don't know if I'd say slightly. The HX1050 is a decent power supply. The AX1200 is in a different class. I might also point out the OP is planning on overclocking the GPU's. The Guru3D article is with stock GPU clocks. You can easily add another 150-200 watts depending upon how far he decides to push them past the stock ~219 watts per GPU. Anyhow, I'm a fan of a bit extra headroom and higher efficiency generally resulting in more stable operation, lower temperature and longer life.