Jholdeman95 :
I'm wondering if the meghalem is the best air cpu heatsink, if not what heatsink will allow me to get the highest stable overclock on my core i5-750. I have great airflow. Also what fans would you recommend for the megahalem or another heatsink
I find that the Megahalems provides the best combination of performance and ease of installation. Seen one review where the Noctua DH-14 topped it by a hair but it's 3+ pound weight scared me a bit and the installation is a bit trying to many. Have also seen more interference issues reported with the DH-14 than i have w/ other HS's.
For moderate OC's (say 3.6) , I'd recommend the Mega and one (1) PWM fan.
For serious OC's (4+ Ghz), I'd recommend the Mega and two (2) PWM fans.
($65 for the HS, $7 for TIM, $11 per PWM fans and $7 for a PWM Y cable splitter if needed).
http://www.frozencpu.com/products/8807/cpu-pro-01/Prolimatech_Megahalems_Rev_B_Intel_CPU_Heatsink_LGA_775_1156_1366_AM2_AM2_AM3_Hot_Item.html
http://www.frozencpu.com/products/7038/thr-41/Innovation_Cooling_Diamond_7_Carat_Thermal_Compound_-_15_Grams.html?id=BZWnrfIC
http://www.frozencpu.com/products/10026/fan-639/Scythe_Slip_Stream_120mm_x_25mm_PWM_Fan_-_SY1225SL12LM-P.html?tl=g36c365s936
http://www.frozencpu.com/products/8418/cab-150/FrozenCPU_PMW_Y_Splitter_Cable.html
If that's a budget breaker, look at the Xigmnatec S1283 or one of the others here:
http://www.silentpcreview.com/Recommended_Heatsinks
http://www.frostytech.com/top5heatsinks.cfm#INTELHEATSINK
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=432&Itemid=62&limit=1&limitstart=23
pick a TIM from the top few here:
http://www.hwreviewlabs.com/index.php?option=com_content&view=article&id=64%3Amega-44-thermal-paste-round-up&catid=32%3Around-ups&Itemid=47&limitstart=3
http://www.xbitlabs.com/articles/coolers/display/thermal-interface-roundup_10.html#sect1
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=138&Itemid=1&limit=1&limitstart=3
Suggest you avoid the tall heat spreaders found on the Corsair Dominators and GSkill Ripjaws with any of these top end coolers. The Mushkin low profile heat sinks are OK in most instances but, to my mind, most heat spreaders have outlived their function. My son's recent build has the Ascent Liquid Cooler son the Mushkin RAM and they do fit under the Megahalems.
He's running a 920 w/ various separate OC profiles stored in the R2E's BIOS .... the "everyday" profile runs at 3.7 Ghz and has core temps in low to mid 50's....the 4.2 and 4.4 Ghz profiles run 70-74
Avoid common advice about 3rd party heat Sinks when using the mega:
1. http://www.prolimatech.com/
Lapping Warning!
Prolimatech does not condone any type of lapping done to the CPU or to heatsink base. Every Prolimatech's heatsink base is designed on a pin-point scale of how the base is to be flat and/or curved where it's needed to be. We have programed our machines to machine the surface in a very calculated way. Any after-manufacture lapping or modding done to the base will alter the design, hence negating its performance factor as well as its warranty.
2.
http://www.prolimatech.com/products/cpu_cooler/megahalems_rev.b.html
Minimal air resistance between fins allowing best balance between noise and performance in range of 800-1200RPM. Above that, it will sound like you live near an airport
If you really want quiet, this is the new kid on the block which doesn't quite matche the Mega in cooling performance while allowing much quieter fans to be used.:
ProlimaTech Armageddon
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=492&Itemid=62
Also note the following author comment on the new kid:
"I can tell you that if you mount this heatsink so it blows air towards the back of the case, you won't come close to the memory."