ok now. i bought these: Kingston HyperX PC2-6400 2GB 2X1GB DDR2 800MHZ CL4-4-4-12 240PIN Dual Channel Memory Kit NCIX.com - Buy Kingston HyperX PC2-6400 2GB 2X1GB DDR2 800MHZ CL4-4-4-12 240PIN Dual Channel Memory Kit - KHX6400D2LLK2/2G In Canada. recommanded in my motherboard manual. So i take off the one i had ..and install both: Legend: | <- Memory Stick. [ ] <- Memory Slot. slot1[|]-[|]slot2 ...BEEP...ok lets take one off.:doh: slot1[|]-[ ]slot2 ...BEEP...ok lets put it in the other one.:x: slot1[ ]-[|]slot2 ...WORKS.. ok what now:dry: what's the problem? both can work on the second slot but i'll get a beep whenever i put it in the first memory slot. [i've checked with cpu-z to make sure i was talking about the correct memory slot.] i've also look at several website talking about "Memory Timing" but those sites shows alot of options in the bios....hmm my bios only has 3 options for that specific thing. any help??? p.s. : just got those today