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ASUS M5A78L LE with 3x AMD 7950 cards and a oczgxs850 with only 2 PCIE power providers, would it work?

Tags:
  • mining
  • Power
  • AMD
  • ltc
  • pcie
  • Systems
  • molex
  • Asus
Last response: in Systems
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January 13, 2014 3:00:34 AM

I need some help, I want to build a mining rig for LTC (litecoin)

I got a ASUS M5A78L LE with 3 times the AMD 7950 cards and a oczgxs850.
But I wonder, how will these cards be powerd? And what type of risers do I need? My board has
1 x PCIe 2.0 x16
2 x PCIe 2.0 x1
3 x PCI

And my PSU (OCZ GXS 850) Has just two PCIe power cables?
1x 24-pin main ATX
2x PCI-Express
1x 4-pin/8-pin CPU
2x 4-pin floppy drive
6x 4-pin peropheral
6x SATA

How can I power all 3 the cards? Or will they get the power from the board? Mybe 2 powerd risers and 1 card getting powerd from the board? Will I need another connector for that?

If anyone can help me out, I would be very happy.
Additional Details
The PSU and Board
http://www.ocztechnology.com/ocz-gamexstream-850w-power...
http://www.asus.com/Motherboards/M5A78L_LE/#specificati...


And the graphix cards
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

More about : asus m5a78l amd 7950 cards oczgxs850 pcie power providers work

January 13, 2014 3:03:17 AM

None of your links work, but from what you posted the Mobo does not support 3 graphics cards, and the power supply will not handle three 7950s.
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January 13, 2014 3:05:26 AM

Devballs said:
None of your links work, but from what you posted the Mobo does not support 3 graphics cards, and the power supply will not handle three 7950s.


Fixed the links. My mobo can support 3 videocards, if I use a 1x to 16x riser. 3 would fit then.
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January 13, 2014 3:09:34 AM

Well your PSU only supports two GPUs, but if you are using risers im sure you could rig up some crazy molex to PCIe power connections too then.
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January 13, 2014 3:06:36 PM

Devballs said:
Well your PSU only supports two GPUs, but if you are using risers im sure you could rig up some crazy molex to PCIe power connections too then.


I changed my mind, thanks to your comment. I am going to build two cards into that system, one last question. Will it be any problem that i have two AMD 7950 cards and just two PCIe 6 pins going from my PSU? Will the cards need 4 together, or will I be fine with just 2?

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