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PSU Suggestions

C

capreppy

[H]ard|DCer of the Month - April 2009
Joined
Jul 4, 2007
Messages
3,410
Looking to do an upgrade of my sig rig.

Currently running a TT 1200W Modular. i7 920 @ 3.9 and 3x GTX285. All of this under WC.

Am looking to upgrade to:
eVGA SR-2 w/2x X5650 (shooting for 4+ GHz)
2x GTX580 in SLI and obviously OC'd (this is [H] afterall)

The TT I currently have I think will handle this, but it's getting a little old (not much, but still not new). In addition, looking for a PSU that is a little more efficient.

For cable management, I would really like a completely modular PSU.

I am running a Corsair AX750 on a dedicated folding rig and really love the efficiency and the completely modular setup. I've got several Corsair PSUs in my rigs and like them a lot.

Am considering running a dual PSU configuration.
2x Corsair AX750 (will actually be buying from buy.com, but the link provides the info on the PSU)

One would power the MoBo / CPUs and the WC Setup. The eVGA SR2 requires two 8 pin ATX connectors as well as 2x 6pin PCIe connectors. The AX750 natively handles this and is the reason I am using it on the SR2 that I currently have.

The second would power 2x GTX580's in SLI. I assume the AX750 would be enough for 2x GTX580's.

So the questions:
Can I run a Corsair AX1200 to power everything? Or am I better off with 2x AX750?
Are there other PSU recommendations that are completely modular and very efficient? Other than the TT I currently have in my sig rig, I've only ever used Corsair PSUs.
 
Hmmmmm, those procs OC'd and OV'd will probably pull 175w each. The two 580's OC'd and OV'd will probably pull 375 each. In that event dual 750's won't do the trick. Also, the 1200 will probably be short or very nearly maxed. I'd go with a 1500w PSU.

Of course wattages assumed are at 100% load and I know you fold so I'm estimating worst case.

How bout this Silverstone 1500w?
http://www.newegg.com/Product/Produ..._re=1500w_power_supply-_-17-256-054-_-Product

It got a nice review here at the OCP.
 
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What about a Corsair AX750 for the MoBo / CPUs and a Corsair AX850 for the GPUs?

An AX750 + AX850 will be cheaper than a single 1500W PSU.

edit; Or even an AX750 + AX1200 (in case I wanted to go 3x GTX580)
 
I think the AX750/850 combo would work fine. The AX750/1200 would give you nice headroom for a tri-sli setup.
 
How about dual 1500 watt supplies? More than enough headroom for throwing whatever at it. Just be sure to run off at least 2x 20 amp breakers.
 
Smuckers said:
How about dual 1500 watt supplies? More than enough headroom for throwing whatever at it. Just be sure to run off at least 2x 20 amp breakers.
Click to expand...

Dual 1500W PSUs would be extreme overkill for my needs :D

The rig has its own dedicated 20amp circuit now and is capable of handling 1x 750 and 1x 1200. 2x 1500 would require me to get another 20amp circuit which is not likely to happen as I already have 3x 20amp circuits going into my home office. the other 2x 20amp circuits go to my server cabinet and everything in it.
 
The AX1200 would be fine for that combination. I also recommend looking at the Antec High Current Pro 1200W, which is actually better than the AX1200 and has multiple rails with OCP.
 
Zero82z said:
The AX1200 would be fine for that combination. I also recommend looking at the Antec High Current Pro 1200W, which is actually better than the AX1200 and has multiple rails with OCP.
Click to expand...

Are you sure about that? He's going to OC two hex cores and two GTX 580's. By my count he's going to be pushing 1100w easily. My HX1000 couldn't handle two 480's heavily OC'd with my 980x heavily OC'd.
 
DooKey said:
Are you sure about that? He's going to OC two hex cores and two GTX 580's. By my count he's going to be pushing 1100w easily. My HX1000 couldn't handle two 480's heavily OC'd with my 980x heavily OC'd.
Click to expand...
I'm fairly sure. GTX580s have lower power consumption than 480s from what I've seen, and his hex cores also have a lower TDP than the 980x.
 
you'll be hardly maxing the antec hcp 1200

here is the tpq 1200 with necessary modifications
http://www.youtube.com/watch?v=4J3Byxo0kls
power a quad sli dual ln2 cooled xeons no problem

its drawing 1700 from the wall so factoring efficiency its bout 1400 being drawn from the psu and the hcp1200 is said to be an improvment on the tpq1200
 
Obsidian86 said:
you'll be hardly maxing the antec hcp 1200

here is the tpq 1200 with necessary modifications
http://www.youtube.com/watch?v=4J3Byxo0kls
power a quad sli dual ln2 cooled xeons no problem

its drawing 1700 from the wall so factoring efficiency its bout 1400 being drawn from the psu and the hcp1200 is said to be an improvment on the tpq1200
Click to expand...

Although nice, I am looking for a completely modular setup. I also don't want to mod the PSU and then void the warranty :D
 
capreppy said:
Although nice, I am looking for a completely modular setup. I also don't want to mod the PSU and then void the warranty :D
Click to expand...

you just gonna use tri sli so cut bout 250 watts from 1400 and your system will only be using 1150 at absolute balls to the wall max
 
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