Hi,
I just found out something about the performance of the SKMiner for AMD GPUs, and I would like to share it, maybe others can also benefit from it.
Yesterday I've tried to install the latest AMD driver (14.12) on my Windows 10 machine that has a single ADM 7950 card mining CoinShield with SKMiner.
The result was a drastic drop in the mining speed from about 35MHash/s to 25MHash/s. I saw similar problems when I played with different driver versions but I didn't realized then what exactly made the difference. I read somewhere that different versions of the OpenCL related dlls may play a role in performance of some miners so I backed up all the DLLs that I know to be related to OpenCL before the driver update. Then, after I saw the sudden drop in the performance I've tried to see if using the older DLLs will affect the performance of the miner, and indeed just putting the amdocl64.dll file in the same folder with the miner restored the original 35Mhash/s mining speed I had before. Maybe this difference in the performance is related to my specific GPU or OS but it worth a try, so I'm sharing the DLL mentioned above:
https://mega.co.nz/#!6c1zTarR!qzIYqEMj-LclQUO-Ykv59Mc1w64nPOZEVbHkbBavBQUThis amdocl64.dll can be found also in the official 14.9 driver. (after extraction the path should be similar to C:\AMD\AMD-Catalyst-14-9-win7-win8.1-64Bit-dd-ccc-whql\Packages\Drivers\Display\WB6A_INF\B176041\amdocl64.dll - DLL version: 10.0.1573.4)
-M
