|"removed the battery from the MB and reseated"|
Doing that resets the BIOS to its defaults. You should enter the BIOS to correct the date/time & other settings. Make sure to save/exit when you're done.
It would help to know the make/model of your board, CPU, RAM, etc. The cause of the 3-beep code varies depending on the BIOS type (AMI, Award, Phoenix, etc). I see ASUS listed in your specs. Memory error is listed as "One continuous beep followed by two short beeps then a pause (repeated)"
Using 3 RAM sticks usually disables dual channel mode so your system might be taking a bit of a performance hit. I presume you're running Win7 64-bit?
message edited by riider