This is a Silenx EFZ-120HA4.. supplied with one 120mm fan
This is what I have in my main system. It works well and I can’t hear it. I like that..
The ends of the heatsink, the sides that you can’t see, are shrouded. This prevents heat falling out over the video card and chipset heatsinks which is a good thing.
I bought it fro around $40 + tax from my local TigerDirect store.
This is also an XtremeGear HP-1216B.. supplied with one 120mm fan. It sold for around $30 in the USA during 2010.
This is a Spire Thermax Eclipse II too.. supplied with two 120mm fans. This assembly is #1 in the FrostyTech heatsink tests. There is one obvious difference. This one is dark nickel plated. It sold for around $60 during 2010. Well, it does have two fans..
This is a 3Rsystem Iceage 120 Boss II uses an identical heatsink to the above and is supplied with one 120mm fan. This assembly is #5 in the FrostyTech heatsink tests, and like the Spire is dark nickel plated.. There was a curious rear spoiler supplied just in case you had a desire to pipe warm air over other motherboard components, so say the reviews. I suspect that if the spoiler was flipped over, it would actually keep warm air from heating up the power capacitors. It sold for around $60 ($65 in Canada) during 2009.
OK. The heatsinks and fitting kits are identical. So what is the real difference?
Well, it would have to be the fan. Not all fans are created equal. Mine has a maximum speed of 2000 rpm and is accredited with being able to move 102 cfm but quietly. One of the others has a fan which can only move 54cfm, but the fan can handle between 2000 – 10000 rpm. Quite honestly, I wouldn’t want to be sitting next to it while it is on full throttle. I have to admit that I thought that the idea behind large fans was that they didn’t have to spin too fast to move large amounts of air.
While I was messing with this, I decided to see what effect disabling AMD’s Cool ‘n Quiet would have. This is what I found out:
Running Cool ‘n Quiet, core temperature rose from 34°C to 36°C which wasn’t so bad. CPU temperature shot up from 36°C to 45°C. Ouch!! I would sooner go for dynamic control over CPU performance than have my system working as a room heater. Fan speed, normally around 1278 rpm, rose to 1450 rpm but I still couldn’t hear anything..
So Cool ‘n Quiet is still enabled, and all is well with the world. The Intel version is called SpeedStep, by the way. If you want a peaceful life, ensure that it is always set to auto in BIOS.