...Computer (ga-sinxp1394 motherboard)? I need to get some memory for an 'older' Computer (ga-sinxp1394 motherboard), but a quick search on eBay shows specific references such as:"Your Gigabyte Technology GA-K8NXP-SLI only supports modules made with a specific type of chip. Should you find what seems to be the exact same memory elsewhere for a lower price, it is very possible that the cheaper memory will not work in your computer."I also saw references to High density & low density memory chips......what's the deal?forgot to add....it currently has a 512M DIMM, and I would like to bump it to about 2GB or so.....so I am looking at either getting 3 more 512's, or a 1GB & 512M to bump this up.....