Did you have any 1HP gap on your Rackbrute 6U? I found that after I put in 88HP of modules, there is a 1HP gap...if you had that as well and still had overheating issues, I'm going to be concerned.
-- jb61264
I never even got it full, only managed about 1 and a quarter filled.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.