I am getting this very same issue,  same GPU. 

I tried all 3 items to no avail.

Anyone else having trouble getting 7950's to be recognized in Claymore?

13:45:46:376   cfc   ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ?
13:45:46:376   cfc   ?     Claymore's Dual ETH + DCR/SC/LBC/PASC GPU Miner v10.0      ?
13:45:46:376   cfc   ?ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ?
13:45:46:376   cfc   
13:45:46:579   cfc   ETH: 2 pools are specified
13:45:46:579   cfc   Main Ethereum pool is us1.ethpool.org:3333
13:45:46:579   cfc   DCR: 5 pools are specified
13:45:46:579   cfc   Main Decred pool is yiimp.ccminer.org:4252
13:45:56:360   cfc   OpenCL platform: AMD Accelerated Parallel Processing
13:45:56:360   cfc   No AMD cards in the list.
13:45:56:407   cfc   cudaGetDeviceCount failed (35, CUDA driver version is insufficient for CUDA runtime version), probably no CUDA devices
13:45:56:407   cfc   No NVIDIA CUDA GPUs detected.
13:45:56:438   cfc   No AMD OPENCL or NVIDIA CUDA GPUs found, exit