PC2 5300 DDR2 667 Computer SDRAM
Modern computers use a form of memory called SDRAM, which stands for Synchronous Dynamic Random Access Memory. All computer memory is DRAM, but some earlier computers did not use synchronous memory. The advantage of SDRAM is that its interface runs at the same speed as the processor interface so that the processor does not have to wait for the RAM and vice versa.RAM Compatibility
With so many different kinds of memory on the market, it can be hard to figure out which memory sticks are compatible with which computer. One thing that makes it easier is that all desktop DDR2 SDRAM memory uses a common interface, which is not physically compatible with any other type of RAM. In general, if it fits in the slot, the memory will work. The one caveat is that if you mix different speeds of SDRAM, such as PC2 4200 and PC2 5300, it will all run at the slower speed.What it Means
PC2 5300 DDR2 667 computer SDRAM runs at an effective interface speed of 667 MHz, producing 5,300 million transfers per second. PC2 4200 is slower, offering only 4,200 million transfers per second. If you want more speed, step up to PC2 6400 DDR2 800 computer SDRAM which has a 133 MHz faster interface, for over a billion more transactions per second than the standard PC2 5300.Laptops and Desktops
While different generations of RAM use different memory slots, so do desktops and laptops. All desktop slots are the same size; they just have different numbers of pins and differently placed notches for different generations of RAM. Laptop memory slots follow the same pattern, but are only about half as long as desktop memory slots. Each desktop DIMM is 133 millimetres long, while each laptop SODIMM is 67 millimetres long.Installing RAM
Most laptops and desktops have user-accessible RAM slots, so there is no reason not to install as much RAM as your computer can handle. In most cases, 4 GB is the absolute minimum for light use, while 8 GB is a good baseline for the majority of users. If your computer can handle 16 GB, it's a good idea to install it.