Quote Originally Posted by eva2000 View Post
Nice review.. have you tried loosening tRFC to say 42 and PL to 5 instead of 4 for CAS4 tests ?

Your modules seem be close to my set of 2GB Gskill F2-8500C5LD-2GBPK serial numbers 7899/7900 vs 7907/7908 - similar max CAS4/5 ceiling @490Mhz 4-4-4-x and close to 600Mhz 5-5-5-15 like mine just vdimm needed in CAS4 drastically different.
tRFC 42 certainly makes a difference, however I wanted to see how high I could go with a tighter timing. As you can see, it doesn't seem to have shown a wall anywhere, it just required more voltage.

What I found odd is that a higher latency than 42 for tRFC did not seem to help with gaining extra stability or MHz. Maybe you found the same?