I have a problem with my S3420GP Board by using M393B5170DZ1-CF8 RAM Modules. After Installing one or two RAM Modules I get 3 beeps, which indicates an incorrect RAM Configuration. By reading the compatibilty list (http://www.intel.com/support/motherboards/server/s3420gp/sb/CS-030738.htm Intel® Server Board S3420GP — Memory and Hardware Compatibility) I found the module:SamsungM393B5170DZ1-CF84 GBRegistered1066 MHzDualK4B1G0446D-HCF8SamsungN/A1.5 Volts
I have also installed the latest BIOS Update of 2014.
Do not trust the beeps and the lights. I had the same problem with my S3420GPLX board. It says RAM error by looking up the error code. But I know the RAMs are good.
I reset the BIOS many times. A lot of errors are related to the RAID controller. But now everything works just fine, with the exact same hardware.....
Just have to keep trying....
DIMMS installed in the Blue slots?
DIMMS need to be filled starting with the blue slots and then filling the slots working toward the CPU,