win xp only reconises 4gb in the entire motherboard. i recoment going to windows 2003 as it reconises 4gb in ram and 2 gb in GFX hardware.
also win vista is a good OS to run off.
It depends on context. 4GB is actually all the memory that Windows XP can handle (there's a special 64-bit edition that can use more than 4GB). However, it's not a huge amount of memory for a video camera (it's not horrible, though; it represents maybe an hour of standard definition video).
4gb ram
4GB
You can compress your files into a spare harddrive to keep your memory ok
Windows XP doesn't directly determine what type of memory can be used; it depends on the motherboard. If the motherboard is compatible with Windows XP and the motherboard supports this memory module, then you can use it with Windows XP.
According to the table in the Wikipedia article (see related link) - the maximum supported RAM is 4GB.
Since the only difference in your detail - is the amount of memory (4GB against 2GB) - go for the 4GB machine. The extra memory will help Windows 7 run faster.
4 GB of memory is the maximum you can use in Windows XP, with only 3.5 GB of it seen by Windows.
I don't know an answer from my experience, but a friend said he tried to put 4GB on XP professional, and Windows recognized only 3GB. This was the system: Asus P5B motherboard, Kingston value pack 4GB, Intel Core2Duo.
Unlike Windows 98, which ran on top of MS-DOS and had an external memory manager, Windows XP's memory manager is built into the kernel.
No. Windows XP has it's own kernel and memory management system.
It depends on the version. 32-bit Windows supports up to 4GB of RAM, whereas 64-bit versions support 4GB + of RAM. It is the same with Windows Vista and 7.