Claymore Miner - Crashes at Create GPU Buffer

Hello there,

I am using Claymore's Dual Miner V10.5 to mine Ethereum. I am using the ETH only mining mode. Whenever I run the start.bat error, my computer hangs and then crashes after this step: "Create GPU Buffer for GPU2"

Here are my specs:
1x Sapphire RX470 4GB Mining Edition
1x Asus Duo RX580 8GB
1x Asus STRIX RX580 8GB
Intel Celeron G3930
4GB Corsair Value Select DDR4 2133Mhz
MSI Z270 Gaming Plus
Corsair HX1200
Corsair ForceLE 120GB

Occasionally, after about 10 computer restarts, I can get the Miner to run successfully and pull 76Mh/s. But this only rarely happens.

Any help would be much appreciated, thanks.