I have a Q9650 in one of my rigs, and it's still a very fast processor. If you want to upgrade to a 2500k, you'll also have to get a new motherboard, and possibly new memory if you're still using DDR2. Also, you may not notice any difference in tasks such as gaming if you're currently using a slow video card. What are your current specs, and what are you using your computer for?
MY PLAN
115592 Intel Core i5-2500K, 3.30GHz, 6MB, HD3000, S1155
155574 Asus P8Z77 V-Pro S1155 Z77 4xDDR3 ATX
155587 EVGA GeForce GTX 680, 2048MB
524746 Corsair Vengeance 8GB (2x4GB) DDR3 2133MHz CL11
540023 Arctic Silver 5 Premium Silver 3.5 grams
556893 Fractal Design Define R3 USB3, ATX, Gray
784661 Silverstone Strider ST75F Gold-G
881020 Noctua NH-D14
883224 4 OCZ Vertex 512GB 2.5 "SATA3
Currently
Q9650
HD5830 Sapphire
Ripjaw 8gb 1333 ddr3
antec 1200
coolit
ep45t usb3p
black caviar 2tb
yeeh time for a upgrade
So obviously the new one is a major upgrade
But i was wondering if i should go for 3930k or just chill with the 2500k
I understand with the 3930k i would have have to update to a new motherboard but i have no problem with that. Also if i did that i would have to remove the 500gb ssd due to budget. New motherboard would be the asus rampage extreme