Jonboy Contributor Joined Aug 29, 2013 Posts 35 Location Worcestershire, England May 11, 2014 #1 I have just installed 2x2Gb DDR2 PC6400 matched memory modules into an Acer Revo R3610. Previously the machine had one 2Gb module installed and showed 2Gb memory installed. I am disappointed to see on Resource Monitor that 1097Mb has gone into Hardware Reserve. The popup says "Memory that is reserved for use by the Bios and some drivers for other peripherals". The Bios does not have any options to retain or allocate memory to specific use. How can I claim back my memory?