Hey there. I have a problem with Sisoft Sandra memory bandwidth test. I have a Rampage IV Extreme mobo, 3930k cpu and 32gb of G.Skill TridentX 2400 memory, is mainly designed for Z77 I know that. However, when I try to run the test it everytime uses only 50% of ram + 3gb for OS so totally little over 19gbs. I have unchecked the "use only 50% ram" thingy in options and locked pages in memory. Programs like Linx use all of my ram without issues so I don't know what is the problem. If anyone knows how to fix this, I'd really like to know.