I have an older run of the mill Acer Aspire 4720Z laptop which is about 2 years old and came with 1 GB of PC-5300 RAM.
I just purchased 4 GB of PC-4300 in 2 sticks and when I plug them both in the computer BIOS recognizes the 4 GB of memory, but Windows Vista crashes with a BSOD just as the boot-up progress meter displays, with 100% consistency.
I tried each 2 GB stick individually and each boots fine; I ran a memory test on one of them and it passed fine. I tried each 2 GB stick with one of the original 512 MB sticks and it BDOD's at the same point.
I have a 2 hour round-trip drive to return the RAM, so I would like to be certain that the 4 GB is not somehow usable (I can certainly make use of it... well the about 3.5 GB that will actually be usable, anyway).
It seems as if Windows or the laptop has a problem with more than 2 GB RAM - is this likely or even possible?