So i put in my new processor. Phenom2 550BE...everytrhings great. TIll i press the power button. THen it wont even post. So i remove it. Try it again. So i remove the ram and leave one stick on the 3rd slot. IT WORKS> SO i test the other stick and remove the other one. IT WORKS>So i put it in dual channel. FAIL. Some reason, i cant run dual channel anymore and i can only run 1 stick at a time ...OCCUPY only one dimm module at a time, Thats it. So im wondering what can i do to fix this. Motherboard. Geforce 8200a Ram: WIntec 800mhz with H/sinks ddr2 All bios are up to date. and this just happend so idk what to do. Ram worked fine till i put phenom 2 in.