New to Overclock.net
Join Date: Jul 2009
Location: Albuquerque, NM USA
3.6ghz is good enough, although I think your issue is a weak x5600. We have plenty of X5650's and up that run ram as high as 1866 or more. My Ripjaws barely make it into the 1800's but I see no benefit from it, not a benefit I care about anyway. I get better results working on the timings as you already did. Mine do 1600 at 1.5v and possibly could go lower but I have not tried it. All this on a Rampage III Extreme and a X5650 at 20x200.
So, I just think its the CPU's IMC you have that is limiting your ram overclocks. This does not mean it is defective though.