Hey Today I bought 2 x 512mb of Muskin dual channge 4000 stuff. I put it in my motherboard, the first time it booted fine, then all reboots failed. It wouldnt even post! Then I jumped to flash bios, and it would boot, but only while jumper in flashed mode; if I put it back, it wouldnt boot! My motherboard is Asrock dual sata 939, Anyone got any ideas?