As stated in my last post, after testing to get NB GTL I had 3 values that stopped Prime @ 9 minutes. -40, -60, & -65.
Not sure if this would make any difference or be correct, but what I did was, Ran Everest Cache and Memory Benchmark, and found that -60 had the better latency.
So thats what I went with.
-40= 54.1ns
-60= 53.9ns
-65= 54.2ns