I am canceling my pre-order (from Steam)

[Devastat]

I have successfully overclocked my Processor to run at 3150Mhz by setting Host clock frequency to 150. My processor is running hot enough that I know that I should not raise this any more than that.

I have a question about memory. I can get my memory to run with two different settings and I am not sure which one is better. My memory is 6x2gb DDR3 1600mhz CL9

Setting: AUTO on bios

(Details from a program called CPU-Z)
DRAM 600mhz
FSB : DRAM 2:8
CAS Latency (CL) 9 clocks
RAS to CAS Delay (tRCD) 9 clocks
RAS Precharge (tRP) 9 clocks
Cycle Time (tRAS) 22 clocks

OR

If I change a fequency setting on my memory settings in bios I can get the following:

DRAM 900mhz
FSB : DRAM 2:12
CAS Latency (CL) 10 clocks
RAS to CAS Delay (tRCD) 13 clocks
RAS Precharge (tRP) 13 clocks
Cycle Time (tRAS) 31 clocks

Now which one of those two Memory options above is better, it seems that the processor is running hotter wen memory dram is set to 900mhz?