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Help Choosing PSU and 280X GPU's for Tri-Fire Setup

post #1 of 5
Thread Starter 
I AM NOT LOOKING TO PURCHASE 3 CARDS; I already have a MSI Twin Frozr 3 7970 that I plan to crossfire with 2 more 280X.

I am partial to the Gigabyte WindforceX3 coolers, but with my Tri-SLI (3 670's) I remember they ran quite hot (75-85 under load), and I am sure that the 7970/280X power draw is quite higher.

So I'm wondering which aftermarket cooler I should go with if I'm going to be sandwiching them together on a uATX board and none of them have that "EVGA" or "Reference Design" that pushes the air out of the case.

In regards to the PSU, I have a Corsair HX850 80Plus Gold Rated, is this enough?

If I need a new one what would be the recommended wattage, feel free to recommend brands but I'm kind of lazy and don't want to have redo all the wiring, so if there is any Modular Corsair one that you could confidently recommend that would be preferred.

For the rest of the specs on my PC see "Workstation" rig in my sig.

Absolute Budget Cap = $1000 but prefer to keep it under if possible.
Edited by EaquitasAbsum - 11/28/13 at 10:00am
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post #2 of 5
If you already have a 7970, why not pick up two more of those? Would probably cost you less too, and you can find many used.
Twin Frozr coolers are quite good from my experience.

PSU wise that is not enough, it may work but the poor PSU will no doubt work hard to manage. I would say a 1200w PSU to have a little breathing room.
Can recommend both the Corsair AX1200 and the AX1200i (which I personally own). Great PSU's. Otherwise you have some good ones from Seasonic and Enermax.

But you will have to change the cables anyways, even if you go Corsair. Since AX1200(i) uses different cables.
Edited by go4life - 11/28/13 at 2:35pm
    
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post #3 of 5
Quote:
Originally Posted by EaquitasAbsum View Post

In regards to the PSU, I have a Corsair HX850 80Plus Gold Rated, is this enough?

If I need a new one what would be the recommended wattage, feel free to recommend brands but I'm kind of lazy and don't want to have redo all the wiring, so if there is any Modular Corsair one that you could confidently recommend that would be preferred.


It really depends on how much overclocking you want to do. Tri 7970s at gold clocks would need a 1300w psu -ish. And then to run triple cards at those clocks would require a big waterloop to deal with the heat. At stock you could get by with a 850w, but you'd be at the edge all stock. And stock sucks imo, hehe.
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post #4 of 5
Thread Starter 
Quote:
Originally Posted by go4life View Post

If you already have a 7970, why not pick up two more of those? Would probably cost you less too, and you can find many used.
Twin Frozr coolers are quite good from my experience.

PSU wise that is not enough, it may work but the poor PSU will no doubt work hard to manage. I would say a 1200w PSU to have a little breathing room.
Can recommend both the Corsair AX1200 and the AX1200i (which I personally own). Great PSU's. Otherwise you have some good ones from Seasonic and Enermax.

But you will have to change the cables anyways, even if you go Corsair. Since AX1200(i) uses different cables.

Ah, was really hoping to avoid switching the cables, and the 280X's are actually much cheaper than the 7970's in Canada, about $50-$100
depending on the make. And would you recommend the MSI's sandwiching them together then?
Quote:
Originally Posted by tsm106 View Post

It really depends on how much overclocking you want to do. Tri 7970s at gold clocks would need a 1300w psu -ish. And then to run triple cards at those clocks would require a big waterloop to deal with the heat. At stock you could get by with a 850w, but you'd be at the edge all stock. And stock sucks imo, hehe.

I was planning on keeping them at stock considering I would be running them on air, and I would most likely be under-volting them like I do with my 7970 now.
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post #5 of 5
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