Well, all is in the title.
I've got Windows 10 Family 64Bit (version 1511, 10586.318), and FX 6300 six core 3.5GHz. There is 2 x 4Go RAM inside but only 3,98 usable.
I think I try everything I've found on Internet (msconfig and so) but maybe there is a BIOS setting I missed.
All help welcome.