ok i will have a look at some overclocks online for the 8 core and im on windows 7 now, may get the 90day free trial of win 8 as i read on on anther post about a 6300 freezing with win7
Hex core, heck, even quad core + HT do not work properly natively in Windows 7. You need core parking hacks and god knows what else, and even then it won't help you on a FX 8.
Certain benchmarks and games I got 0% improvement (as cores didn't matter). However, in other stuff I got a 10-20% improvement.
Microsoft did initially offer fixes, but they did not work. It was only in Windows 8 that AMD approached Microsoft (plus the Xbone and all that) that the FX CPUs got native support without any patches or hacks.
So yeah, you definitely want to be running 8 or above.