i was reading the question with simoneprr about the problem they had with the 64mb sdram they were trying to pu tinto their pc chips m520 with the i430vx-2a59ht5bc-00 chipset. now the reason i was interested is....i removed 64mb of the edo crap and attempted to install 64mb pc100. unlike simonprr, mine worked, but like you reported......it only recognized 16mb of it.....although, with that 16, it ran faster than the 64mb of edo. now...it could be that the jumpers were set at 3.3v even when using the edo ram. but i wanted to know if its possible that even though it recognizes only 16mb, does it maybe use the entire chip?