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it does not need specific instruction written into a programs codeIt has Hyperthreading. Depending on what use you will put it to, it will offer greater performance. Not much everyday use software is coded to take advantage of it though.
This technology is transparent to operating systems and programs. The minimum that is required to take advantage of hyper-threading is symmetric multiprocessing (SMP) support in the operating system, as the logical processors appear as standard separate processors.
I'm just saying I would bet the farm that you will not get a lot of change from 350 for the 2600k.
lol, Think some of you guys are on drugsIf your lucky they will be £280. (That will prob be on the cheaper internet shops)
I think the Ks will be £320 on a good day.

which board did you go for? and what price
£280 still is not great for a 2600K overpriced. * Panic buyers *
It's relative though, how much would a 9** or 8** i7 be today if it was released today and is 3.8ghz straight out of the box? 6 months down the line they'll be cheaper, but they'll also be 6 months old.