The core problem was the cuda hefty Thread per block set to high but took me several hours to find that... btw... +25% in heavy 12500 with 256 threads per block... vs 128 & 512 if max reg count is set to 80...
ccminer
Based on Christian Buchner's & Christian H.'s CUDA project
Fork by tpruvot@github with X14,X15,X17,WHIRL and Blake256 support (NEOS + BlakeCoin), and some others, check the README.txt
BTC donation address: 1AJdfCpLWPNoAMDfHF1wD5y8VgKSSTHxPo
A part of the recent algos were originally wrote by djm34.
This variant was tested and built on Linux (ubuntu server 14.04) and VStudio 2013 on Windows 7.
Note that the x86 releases are generally faster than x64 ones on Windows.
About source code dependencies
This project requires some libraries to be built :
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OpenSSL (prebuilt for win)
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Curl (prebuilt for win)
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pthreads (prebuilt for win)
The tree now contains recent prebuilt openssl and curl .lib for both x86 and x64 platforms (windows).
To rebuild them, you need to clone this repository and its submodules : git clone https://github.com/peters/curl-for-windows.git compat/curl-for-windows
There is also a Tutorial for windows on CudaMining website.