The product is a set of 4GB 2Rx4 PC3 server memory chips, with a total capacity of 4GB per module. These DDR3 SDRAM chips have a bus speed of PC3-8500 (DDR3-1066) and are designed for server use. 

The memory chips are from various vendors such as Samsung, Nanya, Micron.   We have a lot of these so if you have a specific vendor preference , please put that in the order notes.  

ships free the day you pay.   full refund if needed.