Well I had my 550BE 0919EPMW at 3.8GHz (200x19) at 1.4V, the load temps when running prime were around 45'C. That was using the same HSF as yours (lapped also) but my case has 4 120mm 60CFM fans which shift a fair bit of air.
What I found with my chip is:
200x18 @1.3V (stock volts) = ok.
200x18.5 @ 1.35V = ok.
200x19 @1.4V = ok.
So I needed 0.5V more per 100MHz step after 3.6GHz. (This was with all other voltages at stock, NB, CPU-NB, etc)
Good luck, hope your CPU unlocks to 4 cores and is a good clocker
Thanks for the reply Anarki. I've got 3 120's in my case so it will maybe hit 4Ghz I hope with decent temps then. Did you unlock yours? Did you try any FSB OC'ing with it or just multiplier?
i5 750
Intel DP55KG
4GB DDR3 1333
Gigabyte 6950 2GB 880/1375 1536 shaders stock voltage
Corsair HX 650 PSU
Windows 7 64 bit
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