Good heat sink for CPU

Stonytony

Honorable
Dec 31, 2013
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I'm looking for a good heatsink for a amd phentom II 1090t black edition socket am3 for over clocking.

Asus m4n98td evo mobo
Case:aspire x-infinity atxb6kLw-bk

Sence the CPU is a black edition all I should have to do is crank up the multiplier. Am I correct on that?

What safe speeds could I expect?
I've got good air flow though the case. Front fans(intake) rear fans(exhaust) and modified the side fan bigger witch blows right on the CPU.
 
Gaia vs. Hyper212 EVO:
I use and recommend the Xigmatek Gaia over the more often parroted but slightly inferior Hyper212 EVO:
http://www.techreaction.net/2011/07/07/review-xigmatek-gaia-sd1283/7/
http://www.techreaction.net/2011/11/27/review-cooler-master-hyper-212-plus/4/

Unlike the Hyper212 EVO (ignore the URL; it IS the EVO they tested), the Gaia never throttled, although it wasn't always the coolest depending on the fan used. Both got awards, but the Gaia is usually cheaper as well, making it the better choice.
NZXT has a similar 120mm tower cooler that is even cheaper. I would expect its performance to be similar to these.
Overclocking is a crapshoot. Some CPUs overclock higher than others, or can do it on less voltage (which means less heat) than others. Increasing the multiplier a little at a time until the system becomes unstable is a typical part of the process. Some people try to push further after increasing voltage to the CPU trying to regain stability. This can work, but can also shorten the life of a CPU, and/or fry it outright if care is not taken. Make sure to also monitor the temps of the VRMs on the motherboard.