the only reason to go 2500K is if you want the best chance of hitting that braggable 5GHz mark with the least amount of fuss
otherwise the improvements in IPC will make up for any shortcoming in MHz the 3570K might have vs. the 2500K in max OC scenario without getting insane with mods/cooling.
The 3570K will do 4.2GHz EASY with that cooler, and really should be good to go for 4.4-4.5. Its when you start getting into the 4.6-4.7 range when more volts are needed and temps start to quickly balloon. However a 4.5GHz Ivy is easily on par with a 4.7GHz Sandy, and 4.7GHz is about the upper end for average high end OC, you'd be pretty lucky to get a Sandy part that could do 4.8GHz with reasonable volts and cooling.
otherwise the improvements in IPC will make up for any shortcoming in MHz the 3570K might have vs. the 2500K in max OC scenario without getting insane with mods/cooling.
The 3570K will do 4.2GHz EASY with that cooler, and really should be good to go for 4.4-4.5. Its when you start getting into the 4.6-4.7 range when more volts are needed and temps start to quickly balloon. However a 4.5GHz Ivy is easily on par with a 4.7GHz Sandy, and 4.7GHz is about the upper end for average high end OC, you'd be pretty lucky to get a Sandy part that could do 4.8GHz with reasonable volts and cooling.
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