This 512MB PC133 SDR SDRAM Memory is perfect for upgrading your computer's memory capacity. The unit is a Keystron brand, with one module and a total capacity of 512MB. It has a form factor of DIMM and a bus speed of PC133, making it compatible with most computers. The memory features non-ECC and has 168 pins. Each module has a capacity of 512MB and comes in a unit quantity of one. With this memory, your computer will run faster and smoother, allowing you to work more efficiently. Get your hands on this high-quality memory module today and take your computing experience to the next level!