Need full description of RAM for Gateway 300X CEL

Well, a p4 ddr 266 usually has a cpu limit of 2.4 ghz, 400mhz bus. As for Essex, you can purchase those by looking for them online. As for the ram, ask Gateway the max ram limit (likely 1 gig) at 266mhz bus (pc2100). I did a little research online and I did not see any 300x with more than 1 gig or total ram. Look for 266 bus on your ram, (2x512), and a CPU at no higher than 2.6 at 400mhz bus (2.4 would likely be cheaper and may be more compatible, and you only lose 266 megahertz). Also, do not plan on making this into an uber-sweet gaming system. It was designed for basic computing. You can max the ram at a gig, drop a p4 2.4 in it, and add an add-in video card to beef up the graphics. You can play world of warcraft on it, but your framerates will be about 15-25 fps, and you can watch movies and shows, but you wont be impressed. Still, it makes for a great office machine, or drop a big fat EIDE hard drive in it and make it a file server. Also, you can squeeze a little more performance outta your hardware by running Windows 2000 rather than XP or Vista. 2k has less background junk eating up your cpu resources, and would likely perform more smoothly on the older hardware.