I would manually configure your memory to gskill specs first, tcl-9,trcd-9,trp-9,tras-24,trc-33,command rate-2T (@1.52v at least)
If you can't get your memory to run @1600 at stock clocks in either the blue or black slots and increasing memory voltage doesn't help, drop the memory divider to 1333 (6.66). With a fsb of 240 your memory would be back up to 1598 (blue dimms maybe the key at that high of a freq. on your mb..) If no go drop divider to 1066 (5.33) and use a fsb of 250 which will put you at 1333 (@1333 you can probably do 8-8-8-21-30-1T)
Raise your nb freq as high as possible and remain stable. If you want to run @1600ish you'll need your nb feq up around 2400, which may require a bump in CPU_NB voltage. (not NB voltage)
Best bet would be using 5.33 (1066) and a fsb of 250=1333, 250x14=3500MHz at around 1.4 volts. You can lower cpu ratio to lower cpu clock if you want. At 250 and using 5.33 divider that should still give you room to push the memory and cpu further.
Take HT Link Speed off Auto and keep it between 1800 and 2200, currently running at 2360..
"Started to stop itself ? Did you get a "rounding error" on one of the cores ? Rounding errors are usually memory related, ie. memory or cpu_nb voltage too low. Try 1.6 to 1.65v on the memory and 1.25 to 1.35v on cpu
You are at 9-9-9-24-33-2T correct ? Temps are good ? Have you tried increasing vcore at all ?