Unleaded:
I bought a 1GB DDR 400 CL2.5 module ( double sided) and the notebook doesnt boot. Nothing apears on sceen. If I put that 1GB module on slot2 and a 512MB DDR 333 CL2.5 module on slot1, it works fine at 333MHZ speed.
So, the problem is not downclocking, but instabilily, or incompatibility, as the memory only works at 333, and the only way to force it to work at 333 is to have another memory module that has a maximum speed of 333.
I am hopping that the new bios enables me to run the 1GB module alone, at 400mhz, cl2.5.