^^ I believe it is a hardware issue. I think it is your GDDR overheating.
I do not support your piracy, however I do not think that it is at issue here.
Try to underclock your GPU memory by %50 and then run the GPU FAN ONLY at 100% Those 7 additional fans are a bit of overkill and might actually not be helping your heat dissapation.
It depends how they are configured, does air flow from front (intakes) to rear (exhaust). What are your side fans doing? intake/exhaust?
If running the fans at 100% causes a system lock up it is definitely a POWER SUPPLY problem (PSU).