Alfred_i :
i want to buy cpu and my heay program is gaming,autocad and heavy calculation and video....
so i have 320$ for cpu.and i am between i7 930 and 1090t
in froum i read that when you overclock to cpu i 7 930 is better than 1090t.is it true?
Its a tradeoff. The I7 930 is a stronger gaming chip, 1090t is better for encoding. Your doing both, but it looks to me like more encoding. I would go 1090t for sure.
As for your overclocking question, it depends. IF you can overclock them both to the same speed, say 4 GHZ, the 930 would be a little faster as it does a little more work per clock cycle. But the 1090t has an unlocked multiplier which makes for an easier overclock.
Multiplier overclocking is a much preferred route in my view. It also puts less stress on other components like board chipsets and memory since you can leave the MB setting at stock.
Finally, AMD is better at keeping an upgrade path. For example, in a year you decide to upgrade your cpu, but wish to continue using your other components. AMD is far more likely to have a faster, drop in, replacement available than Intel. A big advantage down the line.