4GB Kit (2x2GB) Memory RAM for Compaq HP Business Desktop dc7800 (DDR2-667MHz 240-pin DIMM) When you purchase RAM from 4AllDeals, it comes with a lifetime warranty, as well as lifetime telephone technical support from our US-based technicians. &lt;b&gt;PLEASE NOTE&lt;/b&gt; If you do not purchase this module from &lt;b&gt;4AllDeals direct&lt;/b&gt;, you do not get the lifetime warranty or tech support offered in this ad. 240 pin module RAM Memory will speed up your computer!