what is this error ?
GPU 0, GpuMiner k1a failed -55 ?
thanks
Show me your bat file or config you use than we can help!!!!
GPU 0 = you use one Card right ?
Try to set at least 16 GB of Virtual Memory
see OP FAQ:
Catalyst 13.12 is required for best performance and compatibility. Catalyst 14.x and 15.x are supported as well (usually 14.x/15.x are about 1% slower than 13.12), use appropriate version.
Set "GPU_MAX_ALLOC_PERCENT" environment variable as "100".
For multi-GPU systems, set Virtual Memory size in Windows at least 16 GB:
"Computer Properties / Advanced System Settings / Performance / Advanced / Virtual Memory".