Guys I feel I need to jump in here.

X48 is no P35 for when it comes to clocking memory (DDR2) on the whole, I have tested lttest.bin (new bios) and it does help with higher density modules BUT its no P35 for ease of getting the clocks you want.

Even with the re-spin for X48 I still feel its a DDR3 chipset, and a dual core CPU chipset also as the load quads place on the NB and FSB just ruins how these boards clock.

A prime example is 1600EB 4GB kits, they clock easy with dual cores, put a quad in the board and the issues start. Same with 4GB ddr2 kits, start clocking over 1050 or so and the issues start...especially with a quad core CPU.

Oskar has worked some wonders with the new bios you will see soon, I did hit 1200 with flex2 using it where I can not even do 1100 in rampage formula, but it was not as straight forward as it was in the LP35 LT or the Foxconn MARS I tested.

X48 has limits, try to remember this.