[citation][nom]Anonymous[/nom]I've got 24GB in my system and frequently use 23GB of it up when I'm composing music.[/citation]
Yeah, composition is something I know that takes MASSIVE amounts of memory. Part of why I never got the point of the 64MB X-fi card. Yes, having dedicated RAM on the card can help... But not when it's that little! I'd been wishing that Creative would realize their declining fortunes, and aside from lowering prices, perhaps make a version that packed, say, 2GB of DDR2 (should be faster than their existing XDR, and cheaper, too!) and sell it. While that wouldn't be a "cure-all" for every single instrument table, it'd at least be able to handle better.
[citation][nom]armandomtnz[/nom]What kind of programs could use up to 12GB or 8GB[/citation]
Programs that used large amounts of resources, and would typically instead just read from the hard drive. Video editing is an example; audio and image creation/editing also fit the bill. In those cases, older programs will by default keep using the HDD instead, as they're used to 32-bit environments.
Alternatively, there's also the case for running MULTIPLE programs; while gamers don't need 64-bit OSes, (yet) plenty of others do. And speaking of gamers, remember that a 32-bit CPU and OS has 4GB worth of ADDRESS SPACE; the reason you only get 3.25GB of your 4GB is because the other 4GB of space is used up by other things; a lot of input and output devices are read/written to using the same address table, hence taking up address space that could've also been used for main memory. The REAL big part that will affect gamers, though, is that the video card's VRAM takes address space, too. With the common modern-day prevalence of 1GB cards, many users only get 2.5GB or so; 2GB cards that are slowly coming out will eat this down further, and 4GB cards will outright REQUIRE a 64-bit OS. (AMD and nVidia probably won't even include support for them in their 32-bit drivers)