Originally Posted by MxPhenom 216
The guy above is very wrong. Upgrade to Haswell and z87. It makes EVERYTHING faster. Stick with the 2500k and you will loose about 10% of that 780 performance, even with the overclock. I have 2500k and the same motherboard currently, and plan to go to Haswell in a few weeks as well. Not to mention, motherboards for z87 are so much nicer then anything from z77 and below.
Subjective looks aside (the P67 Extreme 4 Gen3 is a nice looking motherboard already IMHO), how in the world do you lose 10% performance with a GTX 780 and a 2500k? The only way i've seen bottlenecks (hence loss of performance) is trying to run a lowend CPU with 2+ GPU's, like when i ran my i3 with 2x GTX 470's (not my smartest idea, but it worked). Hell, even my 1st generation Xeon (core i7-930) running @ 4 GHz gave enough juice to run my 7950+7970 Xfire setup on a PCI-E 2.0 configuration, even with HT disabled.
Considering how hot Haswell gets when OCing (unless you delid) and how low it can OC even with all the new OCing features from Intel, i'd say stay with the 2500k. You could get more than 4.5 GHz off it if your cooling is up to that, and get more performance off your money. Your motherboard should be up to that task (my P67 Extreme 4 Gen2 can take my i7-2600k to 4.7 GHz fully stable and 5.2 GHz if i really push it for benching)
I'd say hold to upgrade unless you really want native USB 3.0, or you will be using 6 SSD's (only reason that warrants the extra SATA III ports), but PCI-E 3.0 isn't worth it for gaming, and even if you want that, you can get a cheaper upgrade with a 3570K or a 3770K on that same motherboard (since it has GEN3 switches).Edited by Starbomba - 6/10/13 at 7:02am