I have been having issues with this computer, and since MemTest said that there were errors on my RAM, I figured replacing it would fix them... However, after replacing the old stick of RAM, I am coming up with the same errors at the same addresses in MemTest, as far as I can see.
I have a Gateway ID49CU with (now) 8GB of RAM (from G.Skill). I've attached a picture of the memtest errors (just paused it at random and took a pic). I'm unsure if this is A. Indication that this brand-new ram is also bad, B. Indication that some other hardware in my computer is bad, C. Some other issue that I can't guess at.
This memtest is the one built into Ubuntu 12.10.
Image of the screen is as follows: