I recently purchased an off-lease Optiplex 960MT from Dell.  It came with 2GB of DDR2 memory which I need to increase.  DDR2 memory prices are much higher than for DDR3 memory, I can get 8GB of DDR3 for the same price as 4GB of DDR2.  According to the Dell Optiplex 96 technical manual, the chipset in the Opti 960 is "Intel Q45 Express Chipset w/ICH10DO" http://www.dell.com/downloads/global/products/optix/en/desktop-optiplex-960-technical-guidebook-en.pdf . According to Intel's specs for the chipset in the Opti 960, it can use DDR3 memory http://ark.intel.com/products/36527/82Q45-Graphics-and-Memory-Controller-Hub.  As well, I've found a few retailers selling refurbed Opti 960 which, they claim, have DDR3 memory in them http://www.amazon.com/Dell-Professional-Professionally-Refurbished-Refurbisher/dp/B0057GPUXE.  So, is the Optiplex 960 able to use DDR3 and, if it is, what specification?