3 gpus on a corsair hx750

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Gallderhen

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Dec 3, 2013
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10,510
Hi,

I've got a Corsair HX750 (silver) (http://www.corsair.com/professional-series-hx750-80-plus-silver-certified-modular-power-supply.html) running 2x MSI Radeon HD 7950 very comfortably.
I recently got another 7950 and decided that I needed to upgrade the power to something bigger (thinking the Vantec VOLTRA+, 1050w) but that upgrade is a month or 2 away.

My questions are:

1) Can I run 3x 7950 on the HX750 for only a short while?
2) If I can do #1, I only see 2 blue connectors on the PSU for the GPUs, do I have to split one of the cables (and how), or can I run a 6pin non-blue cable from one of the other slots to the 3rd GPU?


-G-
 
Solution
fudoka711
You should not try to run 3 7950's on a 750W psu. This website did find that 3x 7950's only used 411W, but it could easily get up to 450W (http://www.guru3d.com/articles_pages/radeon_hd_7950_crossfire_review_2_and_3_way,5.html).

You're welcome to try running 3x 7950's for a couple months(technically, you're still ducking under the max power output), but it's at your own risk. If you don't have enough 6-pin pcie connectors, you can buy molex to 6-pin connectors (as long as you have enough free molex connectors).

I would still say don't. Try going for a PSU that's from Corsair or Seasonic.
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fudoka711

fudoka711

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Apr 2, 2012
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You should not try to run 3 7950's on a 750W psu. This website did find that 3x 7950's only used 411W, but it could easily get up to 450W (http://www.guru3d.com/articles_pages/radeon_hd_7950_crossfire_review_2_and_3_way,5.html).

You're welcome to try running 3x 7950's for a couple months(technically, you're still ducking under the max power output), but it's at your own risk. If you don't have enough 6-pin pcie connectors, you can buy molex to 6-pin connectors (as long as you have enough free molex connectors).

I would still say don't. Try going for a PSU that's from Corsair or Seasonic.
 
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Solution
G

Gallderhen

Honorable
Dec 3, 2013
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10,510


Its a Biostar TZ77XE4 (http://www.amazon.com/Biostar-LGA1155-Chipset-Motherboard-TZ77XE4/dp/B007RUG8C0/ref=sr_1_1?s=electronics&ie=UTF8&qid=1386075720&sr=1-1&keywords=TZ77XE4)

CPU is a Sandy bridge 2600 (non-k).

-G-
 
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