The memory usage might be high because you have a lot of programs or tasks running in the background of your PC. To fix this right click your task bar and hit "Task Manager". From there go to "Performance" and see what is draining your memory. You will be able to end whatever program it might be from there.
RAM is the memory that is the fastest.
off the computer
RAM (Random Access Memory)
High speed memory that reside between the microprocessor and RAM in a computer.
Computer chips are made from silicon and sand that has a high quartz content. Computer chips help to store computer memory.
VRAM is an acronym for 'Video RAM' which is the high speed computer memory dedicated to a computer's graphics hardware. Some systems use a portion of the computers normal memory for this, and others have dedicated memory for this.
graphics media accelerator or in other words graphics card or video card. a hardware for computer to boost up the speed of the display graphics of the computer. it also ends up the sharing of memory of the computer RAM for the display graphics. it also enables the computer to have graphics memory depending on the memory of the graphics accelerator allowint the computer to have games requiring high graphical memory.
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Autocad and gaming are the biggest two. Any application that requires fast screen redraws, or high detail.
3GB is the size of the memory. DDR3 stands for "double data rate type 3" which is a high bandwidth type of memory. This is a pretty standard size for memory for those who use a computer for everyday tasks but not for high resolution images or gaming.
It is generally better to have a low CPU usage, as this indicates that your computer is not overly taxed and can better handle tasks efficiently. A high CPU usage can lead to slow performance, overheating, and reduced battery life.