Well, I will be receiving an Intel Core i5-2500k, and and ASUS P8Z68V-PRO/GEN3 for Christmas this year from my awesome family. My existing system is as follows, and I will be keeping everything except the CPU and motherboard.
-AMD Phenom II X4 965BE @ 3.75Ghz
-ASUS M4A88TD-V EVO/USB3
-8GB (2x4GB) Corsair XMS3 DDR3-1333
-Dual XFX Radeon 5770 1GB (OC 910 Core, 1315 VRAM) (Original Phoenix cooler, exhausts outside the case)
-XFX 650W Pro Modular XXX Edition PSU
-Antec 300 Case
-Intel X-25V (40GB) SSD, WD 6400AAKS, Samsung HD502HI Storage
-Samsung BD-ROM/DVD+RW, LG DVD+RW
Cooling: Corsair H50 Watercooling kit. I had to purchase a second one, so I'm using both of the fans in push-pull config as exhaust., One 140mm Antec Top fan in low speed, 2x Rocketfish 120mm (1100RPM) Front fans, and one Silverstone FN121 Side panel fan.
Windows 7 Home Premium x64 SP1
Alright, I plan on overclocking. I hope to hit at least 4.5Ghz, shooting for 4.7, 4.8Ghz, if possible while keeping voltage under 1.35v. My big concern is cooling, will the H50 be sufficient cooling for a 2500k at 4.5Ghz+ with push-pull config? My Phenom II hits about 48-55 celsius depending on how cool the room is. Or if there is anything I should know about overclocking this?