I tried to INSTALL a new ram in the motherboard. But when I install it, the computer doesn't BOOT up. But then, I tried to test the RAM/Memory Cards and their slots, they all work. But when they are both installed, it doesn't boot up my OS. Do I have to change something in the BIOS? Or is it in the OS? Here are my computer specs:

Pentium 4 2.66GHz
PQI PC400 512MB RAM(Current)
PQI PC400 512MB RAM(To be installed)
Nvidia Geforce 6200 256MB
EPoX Motherboard
Seagate 80GB Hard Disk Space
AwardBIOS
Windows XP SP2

If you need more info, just post it. Thank you.Do you have the specific model of the mother board? When you put in the 512MB RAM the new one by itself does it work?.

When you install them both is the computer screen just blank or do you get an error message?Do you have the specific model of the mother board? It's a VIA P4M800 mainboard for Intel Socket 775 Processor.

When you put in the 512MB RAM the new one by itself does it work? Yes.

When you install them both is the computer screen just blank or do you get an error message? It's either I get a blank screen and hangs the PC or I go to the stop screen then suddenly restarts.It could be a FIC motherboard, it could be an ECS motherboard, etc.Do you know what is the Maximum amount of RAM your computer can take? How many Slots do you have?

Have you tried reseting your computer COMOS? (unplug powercable and remove battery on motherboard for 5 sec)

*Still trying to find your specific motherboard on the MANUFACTURES WEBSITE*Do you know what is the Maximum amount of RAM your computer can take? 2GB

How many Slots do you have? 2

Have you tried reseting your computer COMOS? Yes

I also found the model of it. It's a EP 5VKMI. I found it here: http://www.epox.com.tw/eng/products_content.php?ps=358