The Ideal System Upgrade This quad rank 16GB IBM PC3L-8500R server memory module, with a speed of 1066MHz and a 8533MB/s bandwidth, offers a great upgrade option to a variety of IBM System x servers. As the inventors of DRAM in 1965, IBM can claim to be the godfather of computer memory, and over five decades later are still manufacturing quality memory chips. Power Saving with Performance DDR3 memory offers numerous improvements over DDR2, such as its ability to transfer data at twice the rate of its predecessor and its prefetch length, which is also double that of DDR2 at 8 bits. It also offers reduced voltage from 1.8V-1.9V to 1.35V-1.5V, markedly reducing the operating cost across multiple servers, with this particular model being a low power module running at 1.35V. This model has a VLP (Very Low Profile), which means the modules are shorter and therefore take up less space in the chassis. Extra Stability As well as featuring ECC (error-correcting code) which detects and corrects the most common kinds of internal data corruption, this HP server memory module is also registered (also known as buffered) which encourages stability in the individual modules via the addition of a register between the DRAM modules, and therefore improves stability in the system as a whole. Wondering if your IBM System x is compatible with this product? Just drop us a line and well be happy to help!