First of all that board supports DDR400 (PC3200) so why did you get PC2100 chips?Anyway, do a bare minimum test (only MB, CPU, RAM & PSU connected, nothing else). Remove all the RAM and test each one individually. Properly insert one into the first RAM slot and test by booting until the POST RAM test is finished. Shutdown and repeat the test with the same RAM module in slot 2 and keep repeating this for every slot. If successful in every slot, mark that module as working then try the other RAM modules using the same procedure.
- As soon as you find one that doesn't fully pass the POST test, mark it as faulty.
- If some pass in one slot but not another, then mark it as faulty.
- If they all fail to pass on a specific slot, mark that slot as faulty and don't use it (you can use electrical tape to cover the slot for future reference).
Once you've finished the bare minimum test, try 2 RAM modules this time (use only the modules that you found to be working from the above tests). Mix and match the RAM modules & then try 3 together and even 4 (if you found all of them to be working fine).Finally once you're satisfied you've found the modules that work properly, boot with
memtest and test the RAM for any problems. If they all seem to work fine individually, boot them individually and test with
memtest to determine which ones are actually faulty.