This has been driving me crazy. I recently purchased 2GB (2 x 1GB) of RAM for my dual boot WinXP Home (32-bit)/Vista Ultimate (64-bit) machine. It currently has 2GB installed. The machine recognizes the 4GB of RAM in BIOS, Vista will boot and recognize the RAM, CPU-Z recognizes the RAM, and I can boot into safe-mode of WinXP. But whenever I try to boot normally into WinXP the machine gets stuck at the boot screen (the one with the progress bar). It never fully boots.
If I remove one stick of RAM (it doesn't matter which stick or which slot) WinXP will boot fine and register 3GB of single channel RAM. I have also tried to turn off every service and start-up item to see if that is what it was but to no avail.
Does anyone have a clue as to what is going on? It doesn't seem to be a motherboard issue or RAM issue (machine wouldn't boot into Vista or safe-mode if it was I'm guessing). All the RAM is from the same manufacturer (Patriot according to CPU-Z) and is the same speed (PC3200 400MHz), etc. I know WinXP will not show the full 4GB but that is not the issue. I just want ti to boot!
Help!
If I remove one stick of RAM (it doesn't matter which stick or which slot) WinXP will boot fine and register 3GB of single channel RAM. I have also tried to turn off every service and start-up item to see if that is what it was but to no avail.
Does anyone have a clue as to what is going on? It doesn't seem to be a motherboard issue or RAM issue (machine wouldn't boot into Vista or safe-mode if it was I'm guessing). All the RAM is from the same manufacturer (Patriot according to CPU-Z) and is the same speed (PC3200 400MHz), etc. I know WinXP will not show the full 4GB but that is not the issue. I just want ti to boot!
Help!