There are four different types of RAM being used or not used...
1...- Free RAM: Lets say there is 600 megabytes of free ram on your mac os x computer. You open up Google sketchup 8 and use it. This takes about 500-900 mb of ram and so your computer would be sufficiently slower than if you had 1.5 gb of ram left.
2...- Wired Ram: This is the ram you will NEVER be able to use. IN mac os x (and i believe windows and linux), wired ram is used to save the kernal and all of its processes. For example, my macbook shipped with 2 gb of ram. However, I am only able to use a little less than 75% of actual usable ram (in programs) because 500 or so megabytes are dedicated ONLY to saving the kernal and processes.
3...- Active RAM: The amount CURRENTLY BEING USED. This is important because it helps determine the amount of free RAM on your computer. For example: 2 gb of RAM minus 500 mb of wired ram minus 1 gb of active RAM minus 400 mb inactive RAM equals about 100 mb of RAM left (free ram). This means i have got to be careful which programs I open right now!
4...- INactive RAM: Inactive Ram is NOT free ram. It is used primarily to save processes (temporarily, unlike wired ram) and open programs up faster. For example, on my Mac OS X Snow Leopard computer, it takes about 14 seconds to open up Microsoft Word 2008 after a force quit. If I do not force quit it after closing the program, and then open it up again, then MS Word 2008 opens up in 6 seconds! (Most of) This can turn into free ram IF you force quit or stop running programs. Then I bet you your computer will become at least a little faster for the time being.
Thanks,
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The microprocessor determines how much RAM your computer can use
More often it is the motherboard which determines the Memory which can be in a PC.
determines how many tasks your PC can handle at a time
to much
The RAM that is used for a laptop is not the same as the RAM that you would use in a desktop PC. The RAM that is used for a PC is much too big to be used in a laptop, so a laptop has to use a much smaller RAM card which is called SD-RAM.
4GB of RAM
The chipset and the motherboard are the primary determination here. In fact there have been motherboards available which can take a couple different kinds of ram (so you can go with whatever is cheap) although not at the same time, but with the same CPU. Pretty much, whatever your motherboard takes, that's what you've gotta use.
3 GB of ram can use for core 2 duo
512 to 1gb ram are recommended
It depends on your operating system, windows 7 and vista 64bit will use as much ram as possible while windows xp has a max of 3.25gb of ram. 2gb is reccomended with any thing other than xp. While on my system with 4gb of ram, it will use about 1.5gb.
dxdiag.exe
The amount of RAM in a system has no bearing on the size hard drive you can use.