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Title: Mixing GPUs - 7950 & R9 280X on one MB Post by: digitsmith on January 08, 2014, 07:37:16 AM Running 4x 7950s on a rig with 3 x PCIe 2.0 x1 slots still available.
Contemplating adding 2nd PSU and 2x R9 280Xs Possible or mixing GPUs not a good idea?? Title: Re: Mixing GPUs - 7950 & R9 280X on one MB Post by: digitsmith on January 08, 2014, 01:23:17 PM Looks like there are miners doing this successfully.
https://www.weminecryptos.com/forum/topic/954-multi-and-mixed-gpu-configuration/ Title: Re: Mixing GPUs - 7950 & R9 280X on one MB Post by: massiver on January 08, 2014, 01:55:56 PM I run 3x7950, one 280x, and one 7870 on my z77 gigabyte board.
The key for me was to use a separate instance of cgminer for the 280x. My understanding is that each instance only supports one thread setting, so the 7950s and the 7870 run at -g 1, the 280x at -g 2. I haven't noticed any effects on hash rate, everything is performing up to spec. Title: Re: Mixing GPUs - 7950 & R9 280X on one MB Post by: digitsmith on January 08, 2014, 01:59:06 PM I run 3x7950, one 280x, and one 7870 on my z77 gigabyte board. The key for me was to use a separate instance of cgminer for the 280x. My understanding is that each instance only supports one thread setting, so the 7950s and the 7870 run at -g 1, the 280x at -g 2. I haven't noticed any effects on hash rate, everything is performing up to spec. Noted - very useful info, thanks! Title: Re: Mixing GPUs - 7950 & R9 280X on one MB Post by: andriusbit on January 08, 2014, 08:27:20 PM Hello,
I am using Club 3D 7950 and Asus 280x on asus mainboard with 3 pciexpress. I am using 2 cgminers. One for 7950 and another for 280x. Works fine, same hash rate like alone. Title: Re: Mixing GPUs - 7950 & R9 280X on one MB Post by: undeadbitcoiner on January 08, 2014, 08:33:23 PM Not so much sure about it, I didnt used but i have seen few forums here about loosing hashrate
Be sure about that or else you could try adding if not with 2 R9 280's you could make your new Rig. Best Of Luck. |