Hi Peers, I have built a new winx64 binary based on the latest GIT repo and turned on the SSE & AVX optimizations by adding this option -DCPU_X86_FORCE_INTRINSICS.
The complete options for gcc is:
DEFINES = -DUNICODE -D__INSURE__ -DQT_GUI -DBOOST_INTERPROCESS_HAS_WINDOWS_KERNEL_BOOTTIME -DBOOST_USE_WINDOWS_H -DBOOST_THREAD_USE_LIB -DBOOST_THREAD_BUILD_LIB -DBOOST_SPIRIT_THREADSAFE -DBOOST_NO_ANSI_APIS -DCPU_X86_FORCE_INTRINSICS -DSCRYPT_CHACHA -DSCRYPT_KECCAK512 -DUSE_UPNP=1 -DSTATICLIB -DUSE_IPV6=1 -DWIN32 -D_MT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN
Try this:
http://sourceforge.net/projects/hnindev/files/yacoin-qt-0.4.0.0-g2nd-winx64.zipFor viruses or malwae precaution, please scan it by yourself.

Used, Working well.