Quote from: Dropkickdragout on June 15, 2011, 10:00:36 AM

Hey bitcoiners, I've got a bit of a problem here and was hoping you could assist me. I'm planning on upgrading my single Nvidia GTX580 to 4 (yes four) AMD 6970's in my primary rig. Now, the problem is, my power supply, while rock solid, is only 850W and with a solid state, a hard drive, 12GB of ram, an i7 970, and an asus rampage extreme all in there, newegg's Calculator told me, very clearcut, that i should have 1650W... wait, what? 1650W? they dont even come that big, so i'm turning to you miners, what the heck do i do? do i stick with my 850W power supply and buy like 2 supplementary PSU's @ 450W each to power my gpu's? I'm at a loss here and welcome your input.

Cheers!

To answer your question

Each 6970 will require 260W each. That's 1040W
And i7 970 drains way too much Wattage.

Minimum PSU Wattage:   1323 W
Recommended PSU Wattage: 1373 W*
Amperage (combined)

+3.3V   +5V   +12V
11.8 A   10.1 A   106.9 A

Minimum UPS rating: 1961 VA
Recommended UPS rating: ** 2600 VA

You'd want a Single Rail for +12V, cuz if not if anything dies there's a chance the PSU will bring the rest with it.

Corsair CMPSU-1200AX is a Single Rail PSU with 100A. What you're asking is impossible.

I'd suggest to drop either the i7 CPU or one of the 6970. No can do with your current set-up.

You'd like to have something that hits no more than 90A. Don't even bother with multi Rail PSUs.

I hope this will help you.

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Takamsda

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