OK - now some critical words from my side. Just noticed the discussion in this thread started by DjLeco about poor mem performance.

And yes - I can confirm.

Tried three 3570k CPUs and two different RAM kits (G-SKILL GTXD 2400CL9 & Kingston HyperX Predator 2666CL11).

Now way to boot more than 1300MHz. Tried all possible settings and also tried to raise VTT & VCCSA. No way..........

So it is indeed something with the board, it's not caused by mem controller or RAM.

Maybe the BIOS is faulty and - by the time - way too old. About 1 year no BIOS update - still 2.90 the latest.

I don't want to blame the board at all - it offers a nice performance but the limitation in mem frequency is annoying.