Hey guys, been a lurking member since 2008. I finally have something here I can't seem to find by searching! 
I have a 2006 WinXP Gateway MX7118 ('04 eMachines design, love it because all ports are in the back). The computer has 512 MB 333 MHz DDR (1×512 MB) SODIMM (PC2700) attached to the motherboard and one expansion slot (currently occupied by a second 512 chip). (Click for full MX7118 specs)
Gateway's site says my computer is "Expandable to 2 GB." Since the 512 MB is there under the keyboard, and they don't make 1.5 GB chips, I'm assuming that means I'm able to add one single 2 GB chip for a total of 2 GB. Gateway support guy (who wasn't too knowledgeable) said that if I add 2 GB the 512 MB will become unusable, so I'd be running with 2 GB, which would be fine with me. BUT, every single memory site I go to besides Gateway seems to say that the MX7118's expansion slot will only accept a 1 GB chip in the expansion slot. Examples: 1, 2, 3, 4, 5.
Through searching, I found that the "built-in" 512 MB chip is accessible by opening up the machine, which I can do. I want as much RAM possible because I will install Windows 7.
Also, my motherboard's bus speed is 1600 MHz. Would that accommodate PC3200 400 MHz RAM? Would it put any added strain on the motherboard or cause it to overheat? Would this 400 MHz RAM be any improvement, or should I just stick to 333 Mhz? Can you mix and mach 333 and 400 on the same computer (333 on MB and 400 in expansion slot)?
Sorry for the detailed questions about an old computer. I'm just hoping that one person knows! Thanks!
I have a 2006 WinXP Gateway MX7118 ('04 eMachines design, love it because all ports are in the back). The computer has 512 MB 333 MHz DDR (1×512 MB) SODIMM (PC2700) attached to the motherboard and one expansion slot (currently occupied by a second 512 chip). (Click for full MX7118 specs)
Gateway's site says my computer is "Expandable to 2 GB." Since the 512 MB is there under the keyboard, and they don't make 1.5 GB chips, I'm assuming that means I'm able to add one single 2 GB chip for a total of 2 GB. Gateway support guy (who wasn't too knowledgeable) said that if I add 2 GB the 512 MB will become unusable, so I'd be running with 2 GB, which would be fine with me. BUT, every single memory site I go to besides Gateway seems to say that the MX7118's expansion slot will only accept a 1 GB chip in the expansion slot. Examples: 1, 2, 3, 4, 5.
Through searching, I found that the "built-in" 512 MB chip is accessible by opening up the machine, which I can do. I want as much RAM possible because I will install Windows 7.
- 4 GB Scenario: Put 2 GB in expansion slot + 2 GB in motherboard (MB wouldn't recognize it all though, right?)
- 2-2.5 GB: Put 2 GB in expansion slot (and MB may or may not recognize both the 2 GB and the pre-installed 512).
- 2 GB: 1 GB + 1 GB, one in expansion slot, one on MB
- 1.5 GB: 1 GB in expansion slot and run Win7 with only 1.5 GB

Also, my motherboard's bus speed is 1600 MHz. Would that accommodate PC3200 400 MHz RAM? Would it put any added strain on the motherboard or cause it to overheat? Would this 400 MHz RAM be any improvement, or should I just stick to 333 Mhz? Can you mix and mach 333 and 400 on the same computer (333 on MB and 400 in expansion slot)?
Sorry for the detailed questions about an old computer. I'm just hoping that one person knows! Thanks!