mfaktc - invalid device function
 

I have a fairly new machine with Windows 10 and a geforce 960 GPU.
When I try to start mfaktc, I get a failure. Any advice?

[QUOTE]
C:\gpu\mfaktc-0.20>mfaktc-win-64.exe
mfaktc v0.20 (64bit built)

Compiletime options
THREADS_PER_BLOCK 256
SIEVE_SIZE_LIMIT 32kiB
SIEVE_SIZE 193154bits
SIEVE_SPLIT 250
MORE_CLASSES enabled

Runtime options
SievePrimes 25000
SievePrimesAdjust 1
SievePrimesMin 5000
SievePrimesMax 100000
NumStreams 3
CPUStreams 3
GridSize 3
GPU Sieving enabled
GPUSievePrimes 82486
GPUSieveSize 64Mi bits
GPUSieveProcessSize 16Ki bits
WorkFile worktodo.txt
Checkpoints enabled
CheckpointDelay 30s
Stages enabled
StopAfterFactor bitlevel
PrintMode full
V5UserID (none)
ComputerID (none)
AllowSleep no
TimeStampInResults no

CUDA version info
binary compiled for CUDA 4.20
CUDA runtime version 4.20
CUDA driver version 7.50

CUDA device info
name GeForce GTX 960
compute capability 5.2
maximum threads per block 1024
number of mutliprocessors 8 (unknown number of shader cores)
clock rate 1278MHz

Automatic parameters
threads per grid 1048576

running a simple selftest...
ERROR: cudaGetLastError() returned 8: invalid device function
[/QUOTE]

You'll need a version of mfaktc compiled for cuda version 6.5 and a higher computer level supported by your card. They build you're looking at is compiled for a much older compute/runtime version

As David already pointed out: [URL="http://mersenneforum.org/mfaktc/mfaktc-0.21/"]http://mersenneforum.org/mfaktc/mfaktc-0.21/[/URL]

Oliver