Why can't I add 512 MB of ram to my celeron 700?

Answer 1

Without knowing what your motherboard is, I can only speculate on the problem. Most boards of that era should accept up to 512 MB of RAM, using two 256 MB SDRAM modules. Check that:

1. The RAM modules are both 256 MB modules.

2. They are seated correctly in the slot.

3. That one is not defective. If you only reach 256 MB of RAM, remove one, test, and then replace and remove the other one.

4. Some unscrupulous retailers will sell you a "low density" module that does not meet official JEDEC standards. These modules are built with slower and cheaper RAM chips, and will only work on certain chipsets. On Intel chipsets, they will fail to work at all, or will report an incorrect amount of memory.