Why wont ram work in my computer?

Question

I got 4 dimm slots .2 first slots have ddr2 6400,when i try to add 2 512mb system wont boot.the 2 512mb are 5300.But isnt the ddr2 back ward compatable?32bit vista

Answer 1

I don't know. YOu should have the documentation that came with your computer. It tells you all about upgrading RAM.

Answer 2

Your machine probably requires the higher-spec 6400 DDR chips.

Answer 3

go into BIOS and manually setup your ram timing for 5300 . After doing this, try adding your new sticks.