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Well in some things the i3 is better, in some the Q6600 is better, you can't really say which is best over all. :/
Ive come from a OCd Q6600 to an i3 @4.4ghz and tbh im loving it, much faster, Better for F@H. Loads Cooler too, altho i am watercooled.
I dont think you will be disapointed![]()
i3 will be faster in two threaded applications. However it will struggle in games that make use of 3-4 threads against Q6600.
You can overclock Q6600 more to 3.4Ghz if you want..
My motherboard a limiting my q6600 OC to 3.1 stable. witch is way i was asking about the i3 because a Good 775 board and cooler to OC more like 3.8 would cost nearly as mush as a low cost i3 package would.
I have a Q6600 that I run at 3.8Ghz stabily with very good air cooling but *very* few will do this. The average I would expect is ~3.4Ghz with decent voltages/temps.
4Ghz+ on an i3 should be faster than a 3.4Ghz Q6600 in most things that you seem to do but optimised SMP stuff I would take the quad core.
It's a shame that you can't access the members market yet to pick up a good second hand board P35/P45 board for around £40 as that would get the most out of your Q6600.