Hello,

I purchased an Optiplex 380 a couple of years ago which came with 2x2GB RAM @ 1066Mhz and now I think time has come to upgrade to at least 8GB. So, I tried a kingston value ram of 4gb @ 1333Mhz and unfortunately it beeped with 1 and 3 diagnostic LEDs lit. I know that the Dell manual says a maximum of 4GB ram but I have seen people here on dell forums running 2x4GB without any problems, so according to my thinking, maybe the bus frequency is the problem? shall I try 1066Mhz? Crucial's site also suggests up to 1600Mhz so whats the confusion here?

P.S. I have latest BIOS A07 flashed.