Quote from: Bamsed on April 27, 2016, 11:22:07 AM

Quote from: apriyoni on April 11, 2016, 07:03:10 PM

Quote from: juni0r on April 11, 2016, 12:38:28 PM

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Quote from: malickie on April 07, 2016, 03:06:17 PM

Yeah, I had an issue with massively slow hashrate on a brand new 390x. Had the newest Crimson installed, bumped back to 15.something and my hashrate went to where it should be. By bad hashrate I mean it was only putting out maybe 10 and it was never recognized by the pools. So what I am saying is you need to do a search for a version of Crimson that will function properly for your setup.

For me, the Crimoson cannot regcognize 8 GPU in my 4x7990 set up. I used the lbr 7+ driver mod, did not work.

For my 4x7990 setup, with Catalyst 15.11 or early, the 8GPU were recognised instantly, there is no need to mod.

May i know What type of mobo you are using to run 8 x GPU ?

I have a few motherboards running 8xGPU. For the 4X7990 = 8 GPU, it will run on many MB. Nothing special.

For the 2X7990+4X7970 or 2X7990+4x390, I use the Asrock H61 pro BTC.

I have the 2X7990+4x390, I use the Asrock H81 pro BTC. But I have to use two power supplies instead of one.

If you under volt the 7990 and 390, you might be able to use one power supply, such as 1250W platinum .