MFAKTC wont run on a GTX 980
 

Hi everybody,

I just got my new GTX 980 up and running but sadly when I try to run MFAKTC, I end up with the following output:

[CODE]
C:\Users\Peter\Desktop\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 6.0
CUDA driver version 6.50
ERROR: CUDA runtime version must match the CUDA toolkit version used during compile!
[/CODE]

I was not able to find MFAKTC-binaries that have been compiled for:

[CODE]CUDA version info
binary compiled for CUDA 4.20
CUDA runtime version 6.0
CUDA driver version 6.50[/CODE]

Can somebody help me out with this? :-)

Grabbing a newer CUDA library should work: [url]https://developer.nvidia.com/cuda-downloads-geforce-gtx9xx[/url]

[QUOTE=Mark Rose;384925]Grabbing a newer CUDA library should work: [url]https://developer.nvidia.com/cuda-downloads-geforce-gtx9xx[/url][/QUOTE]

I think mfaktc just needs to be recompiled for the new CUDA 6.x.

[QUOTE=kracker;384927]I think mfaktc just needs to be recompiled for the new CUDA 6.x.[/QUOTE]

Can I do this without having to install some full blown development environment?
Or could you maybe do me this favour? :)

[QUOTE=Peter;384933]Can I do this without having to install some full blown development environment?[/QUOTE]
More or less, yes if you are running lin*x.
Almost certainly, no if you are running wind*ws.
[QUOTE=Peter;384933]Or could you maybe do me this favour? :)[/QUOTE]
You may want to ask user FlashJH. Try Options::Send new message. (Options tab at the top left.)

Thanks Batalov.
I hope he's going to answer me. :)

PM received :)

I have the ability to compile; I'll try it later tonight and I'll keep you posted.

[QUOTE=kracker;384927]I think mfaktc just needs to be recompiled for the new CUDA 6.x.[/QUOTE]

If you compile with the right set of options, the compiler will leave some intermediate code in the binary, from which all future CUDA driver versions can recompile an appropriate version -- no need to recompile for each an every CUDA release.

Agreed, I compile with all available [I]real[/I] GPU and [I]virtual[/I] PTX architecture switches. In this case the GTX 9XX series requires the newest version of CUDA 6.5 that was just released.

I attached the newest 64-bit Windows version. Give it a test and post your results. Make sure you're using the newest drivers. If you run into a missing library file, download it from [URL="https://sourceforge.net/projects/cudalucas/files/CUDA%20Libs/"]here[/URL].

Happy TFing :smile:

Can you post this updated info from your test run:[CODE]CUDA version info
binary compiled for CUDA 4.20
CUDA runtime version 6.0
CUDA driver version 6.50
[/CODE] Thanks.

Thank you FlashJH. It is working now.
Its running at mindblowing 515-535 GHz-d/day.
Finishing off a 70-71 search takes about 6m20s.
Great!

Do you happen to have a wattmeter, I'm curious how much it consumes running mfaktc?