Hi dangermouse. In my experience, level 2 cache is usually integral with the motherboard. In my old TMC Socket 7 motherboard I'm sure it was soldered into the board. If you want to add more, you need to identify what motherboard you have and check the manual to see if yours is socketed or soldered. It is quite possible that the chips used are no longer available. Unless you are having problems with your pc, I suggest that it isn't worth the bother of trying to upgrade the L2 cache.