True. dinos22 when you say you run ERAM, do you install the OS on it too?

Don't worry, I'll test the "possible" impact of RAMdisks in my build. I have two sets of DDR2 RAM now. It may not make a difference where you already have fast, low latency drive access but it may do if you don't.

BTW that mapping is from the calculation start of 1M not from the opening of SPi.

And another thing for guys benching: I'm not sure why you disable a core and deem it fast (unless you experienced it?) but I get slower times by running on only one core, repetitively. My Spi is by default running 90% on Core0 and 10% on Core1. In 1M, its 0.165-0.200s slower for me no matter which single core I use, even if I just set the affinity to one.