Mine is 5.3. I think it's funny that some of the DDR2 owners are getting lower than 5.9. I pulled a 5.9 with my OCZ DDR500. If I could have gotten Vista installed on my Segate Raid, there would be no doubt I'd be pulling in 5.9 on the HD as well. Just the CPU would be the only one holding it back to 5.3.