Sorry but I can't stop laughing
Nothing like that is needed if you put a v2 GPU heatsink (with heatpipe) and tinker with the automatic adjusting temps. Put it to run at 50-60 degree Celsius and you're fine.
The fun will last for years.
I didn't tinker with my live XBOX360 flash for obvious reasons but I did put the fans at 100% with a hardware mod when the console was new (years ago) and look it now... It still works ... No holes drilled, even.
But it sounds like a JET ENGINE D: