Problems booting up with 4gig of ram

[tronet33]

i have a asus m2n dh motherboard and a athlon dual core 2 corsair ddr2 667 ram problem is when i boot the pc with both ram insatlled the pc wont boot when i try with one stick of ram it works allso try with both ram seperately no problems there
i have tried memtest to test the memory no errors there and put them in different slots

 

[o1die]

Look for a memory mapping setting in the bios and see if you can change it. If both ram sticks are the same brand and model, they should work, but check your motherboard manual for possible configurations. For example, if both sticks are double sided, they may not work well together. The manual should give you more info.

 

[raymondit]

Which memory banks are they installed in? Do you have anything in the PCI slots, if so take out everything. Just have the Video and memory. See if that works
Update
check out the manual at
http://www.manualnguide.com/download/manual-guide/asus-m2n-dh-users-manual-english.html