Hello there. I'm using 2 ram kits with 2 gigs each, 1333mhz each, CL9 each. If I leave the jumpers by default I only get 400mhz - I want to use them at their full potential so I changed the jumpers as I saw in the manual (I'm using a http://www.asrock.com/mb/Intel/X48TurboTwins/ ). I placed them as shown for the 1333mhz situation but now I only get like 319 MHz (ddr 667 or smth..). Does anyone have any idea how can I fix this? Thanks!