Answer(Techsupport)Resolution: RAM and virtual memory are two different things. Virtual memory allows you to use a portion of your hard drive as though it were RAM. Your hard drive is up to 100 times slower than RAM, so virtual memory is much slower than RAM. When you upgrade your RAM, you can reduce or eliminate the use of virtual memory. Upgrading RAM makes memory available to complete tasks previously handled by virtual memory.
Graphics card, and RAM ( Random Access Memory )
the function of a memory ram is to store memory that can be accessed later on.
RAM or 'memory'
The highest amount of RAM that the Apple laptop can support is 2GB. To be able to use the maximum amount, install the memory in each socket of the computer.
You may wish to check your system configuration such as installed RAM. Try troubleshooting the lag issue, is it only when you run 'Steam'? Does your Mac lag with any other applications? It may be a bug in the version you have, but it may well just be a RAM issue that needs fixing by adding more memory modules to your Mac. But nonetheless, you should contacting support for the 'Steam' application.
RAM is one of the memory... it is non volatile memory...
If your short on memory and that definatly is your bottleneck, once you set up the ram correctly you should notice that some programs will run faster and things that used to lag when RAM was the system bottleneck will work ok, you can rum more programs at once.
Non Volatile RAM (NVRAM) Memory DeviceRead Only Memory (ROM) Memory DeviceRandom Access Memory (RAM) Memory Device
The computer totals up the amount of memory installed, so it has a total of 4gb spread over 2 memory sticks, which makes each RAM card 2gb.
Kingston makes several different types of RAM hardware, including system specific RAM and a value priced line.
RAM: random access memory