got some issues with my new Rig.
Got 4x 6870 running on Windows 7 64 bit.
I can mine with 3 cards without any problems, as soon as i plug in the dummy plug for the 4th card the miner won't start anymore, just crashes instant (tried: Phoenix Miner, Phoenix Rising, GUIMiner).
Got a 1200w high quality PSU (Silverstone) with a lot of ampere etc. Mainboard is a MSI 890FXA-GD70.
I tried to connect 2 cards with a crossfire cable and put the dummy plugs into the 2 other cards.
This is working, but i can't adjust the core clocks, memory etc. and the crossfire mining performance is about 15% lower.
I remember some older thread with the same problem but i can't manage to find it anymore
MSI Afterburner won't start either "Unable to initialize display driver wrapper".
Any suggestions? I can switch to a linux distribution too if this will help.
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Orignal From: 4x 6870 Windows 7 Miner Crash
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