....The CUDA developers kit isn't needed for the ZEC or ETH miners.
This... I can't get my head around it. You're one of the few who's even mentioned the SDK. I've been trying out mining on my GTX 970 FTW+ for a week or so with OpenCL cos when I tried to run genoil's ethminer in Cuda mode I get the error :
Using device: GeForce GTX 970 (Compute 5.2)
CUDA error in func 'ethash_cuda_miner::init' at line 243 : all CUDA-capable devices are busy or unavailable.
Cuda error in func 'set_header' at line 161 : all CUDA-capable devices are busy or unavailable.
I've read a few say the CUDA SDK is needed, but most just say install older Win7 drivers (I'm on Win 10 atm) & setup your bat file. I did end up installing the SDK and CUDA mining worked. At about 3MH/s!, but it worked. Based on all I've read the abysmal hashrate was my fault for not downgrading the drivers. The CUDA SDK forces you to install 371.something but I guess it's not early enough.
I was tired and just wanted back at @21MH/s so I could go to sleep. It also seemed fairly comparable to CUDA hashrates I'd seen, but it's a really high ASIC card and I'm sure there's a bit more in it using CUDA. I have a 1060 on the way for HEVC, which I'll also mine with when it's not in heavy use. That card seems much more straightforward.
So do I just need to install the recommended Win7/8 drivers? 347.88 seems popular. I realize the easiest thing (easier than writing this) is to install them and find out, but I also wanted to put this out there cos I know others have had this error, and still do. So hopefully this can be a post for them to find an answer also.
Thanks in advance for any help.
Edit - Well, 2 hours and 6 driver installs/fails/cleanups later and I'm nowhere. Win7 347.88 eventually showed as being installed but no control panel, GPU-Z showed no functionality, ethminer couldn't see any GPU's. I'm on the latest Insider build, so way past Anniversary update. It's 6am, wanna sleep again with some dog barking endlessly 10 feet away from me......
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