This would depend on your Operating System and motherboard. For example, if your computer runs on 64-bit Vista with 4 DIMM slots, you could upgrade up to 8GB with four 2GB sticks.
No, not usually. Check with your motherboard specifications to see what RAM is needed and the maximum RAM your motherboard can handle.
The Compaq SR1940IL supports a maximum of 2 GB of RAM, using two 1 GB modules of DDR2-533 RAM.
In general laptops are not easy to upgrade. You MAY be able to add more RAM, but some laptops are sold with the maximum RAM they can handle already installed. You probably cannot upgrade the CPU, but you can't necessarily upgrade the CPU in a desktop without replacing the motherboard.The only upgrade that you can almost certainly make is to increase the size of the hard drive.
The Dell Optiplex supports a maximum of 512 MB of RAM using two 256 MB PC100/PC133 SDR SDRAM modules.
This depends on the number of RAM slots in your computer itself, which varies from model to model.
Size is generally 16gb, although i think there are technically TB sizes. The newest type is ddr3.
That depends on the speed of the processor that is installed in the computer. It can be different speeds. It also depends on how much ram is in the computer as well.
Run Belarc Advisor to find out what kind of motherboard you have. Then Google it to find out what the maximum RAM it will accept both per-slot & overall. From there, it's just a case of order it & put it in.
There is two types. There is DDR notebook RAM and there is DDR desktop ram. They can't be used vin each other (notebook RAM can't be used in a desktop) unless (in rare circumstances) you happen to have a notebook ram port on your desktop's motherboard. But no, DDR is a technology. Both desktops and notebooks support this technology because there is notebook DDR and desktop DDR. but notebook DDR can't be put in desktop DDR and vice versa.
The recommended minimum size is equivalent to 1.5 times the RAM on your computer, and 3 times that figure for the maximum size.
You cant mix differente speeds or types of ram. Sizes are ok to mix. Oh and you cant put in ram with a higher speed than your motherboard can handle, plus all computers have a maximum ram which can be installed, so check that too.
A desktop saves memory in the CPU. When one wants to access information, the random access memory, or RAM, is used. The amount of memory a computer has depends on the size of the CPU.