This is the error I get with my 7970. Newest driver, W10 64bit.
tpsieve-cuda-x86-windows.exe -p9704T -P9714T -k3 -K9999 -n9M -N12M -ffppr12M_9704T-9714T.txt -M2 -q
tpsieve version cuda-0.2.3b (testing)
nstep changed to 32
tpsieve initialized: 3 <= k <= 9999, 9000000 <= n < 12000000
Sieve started: 9704000000000000 <= p < 9714000000000000
Thread 0 starting
Detected GPU 0: Device Emulation (CPU)
Detected compute capability: 9999.9999
Detected emulator! We can't use that!
It would have been funny if it the last line said "Ain't Nobody Got Time fo dat!" instead.