But is there a way to measure it? I currently run the memory at about 1030MHz. When I tested it and went to synchro ratio, it was already mentioned 826. I even managed to go down to CL3 and generally drop the timings by noticeablel amount, but benchmarks still reported pretty big drop in performance compared to the usual setup! So I really don't know what to think. I go by the numbers which happen to be uncompromising! And um I already got effective FSB of 1652 So unless there is a test that can clearly show there is performance benefit in underclocking the memory, I guess I will stick to what I have at the moment. Oh, let's have a screenshot of my usual configuration.