Hi Newzild, welcome to the PCHF!
Mr On Line is correct in assuming that it's your
RAM.
Can you please crack the side of the case open, and remove the
RAM (becareful not to touch the connectors on the bottom of it)...you shouldn't have to clean it...once you've pulled them out - reinstall them.
If it still beeps at you, remove the memory, get a
soft tipped eraser, and rub the connectors very lightly, and then reinstall.
If it still beeps at you - remove your video card, and reinstall it.
Hope this helps.