hey guys, i hv an intel 845D AGP chipset on my comp. it has two slots for SD-RAM now, here's the problem i have 2 128 mb 133Mhz modules. i hv got my friends 256 mb 100Mhz module 4 some days. but when i try to put the 256 + 128 combination, the system detects it as 256 mb or sometimes refuses to boot up. i tried this with the other 128 module as well. 4 some reason the system does not detect the total RAM as 384. is this a memory timing mismatch?? Also where can i find out the maximum RAM capacity supported by my mobo?? will upgrading my BIOS help??