http://puu.sh/llpgk/1d3d2a27cf.jpg
It has been few months ago when I first heard of the bug.
Now I got a Cobalt card with it, and I presumed to check if it works or not.
After checking with a stopper, this is the conclusion: With the augment or without, it takes 5:30± seconds for the minigun to overheat. Same time with the augment and without!
I hope this will be fixed for the next patch, thanks!