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MC462 HEAT SINKS
Dec 23, 2000 product introduction - Updated May 3, 2001 MC462 for AMD Socket A and IntelŪ PentiumŪ 4 We have done it again! This is the world's first heat sink compatible with both AMD socket A and IntelŪ PentiumŪ 4 to use the new mounting specification through the motherboard. Just as in our new MCW462 liquid cooler, this specification allows us to use the maximum permissible size per AMD and IntelŪ design guides (3"x3"). In other words, if your motherboard respects the chip manufacturers' specs, the cooler will fit! Compatible boards tested so far include: Asus A7V, Abit KT7, and Intel's PentiumŪ 4 reference board.
And it is massive indeed! With it's 9.4mm (3/8") thick copper base, and 269 high thermal conductivity aluminum pins, the MC462 can easily handle the heaviest thermal loads in the industry... with room to spare. The 9 in2 copper base is largely responsible for the MC462's uncanny ability to rapidly spread AMD's and P4's highly concentrated heat source through the pins. It is also responsible for this heat sink's hefty weight: 20oz (560g) without fan. We designed the MC462 to be used with any 80mm fans. This class size pushes more air than most 60mm fans, while being more quiet. Following the initial MC462 product release in December, which featured a Delta fan, we are now shipping the MC462 with the Sanyo Denki 80x80x32mm, "Petit Ace 32", quiet series fan (see specs below). In another industry first, we are also offering this product with an optional rheostat that will allow you to adjust the fan speed (and noise level) to your own level of performance and/or comfort.
The MC462 is an extreme duty product. We designed it to meet the needs of very harsh production environments where ambient temperature cannot be controlled. In addition, because of it's mounting system, it sits very securely on the motherboard. We conducted crash tests by dropping repeatedly a computer equipped with the MC462 from the roof of a one story building, with no damage to the processor. Crash test procedure: Barebone equipped with an Asus A7V motherboard, our favorite Duron 650, and the MC462 heat sink without fan. The only protection between processor and heat sink was a piece of paper masking tape (only because we didn't want to damage the heat sink's soft copper surface!). The barebone was thrown from a height of approximately 30 feet, three times: once on the back, once on the front, and once on the side. We wanted to study how an extremely violent impact would affect the assembly in totally different and opposite directions. Evidence:
We tried the processor after each test. It remained functional throughout the abuse, and is still working today. There was extensive damage to the case, but no damage whatsoever to the motherboard, nor to the heat sink assembly. 3. Performance, a new level of overclocking With a C/W of .16 (w/Delta fan) at full fan speed, the MC462 allowed us to reach close to the same performance as our MCW462 liquid cooler: Our 650Mhz test Duron was able to run stable at 1010Mhz @ 1.98v, a 65Mhz gain compared to our MC370-0A! More results will be published as we test new processors. 4. Compatibility with Socket A (AMD) and socket 423 (IntelŪ PentiumŪ 4) Motherboards Socket A: The MC462 was designed to fit socket A motherboards within AMD mechanical specifications. These specifications can be found here: www.amd.com/products/cpg/athlon/techdocs/pdf/23794.pdf. (page 19). Revision .01 of the MC462 features notched corners to allow clearance for capacitors found in some DDR motherboards, such as the Asus A7M266, Iwill KA266, or the Epox 8KTA3 as shown below. The product was also tested at MSI labs, and we were informed by MSI that it is compatible with all their socket A and PentiumŪ 4 motherboards.
Here is a schematic of the MC462 overlaid onto AMD's "Motherboard keepout areas for Socket A AMD Athlon Heatsinks". There are basically two keepout areas defined by AMD for component height restrictions. The red areas on either side of socket limit the height of any component to .140" (3.5mm), and the pink areas to .400" (10mm). Click on the thumbnail to enlarge
WARNING! Some motherboards, while in full compliance with AMD specifications, do feature capacitors that are taller than the clearance provided by these notches. In these instances, it is not possible to install the MC462 in its current design. Below is a list of known incompatible boards, which will be updated as we go: 5. Known incompatibilities (as of June 1st, 2001): Asus A7A266, Gygabyte GA-7DX, GA-7DXR Tyan Trinity KTA, Tyan S2462 UNG Thunder K7 dual CPU, FIC AZ11E Possible remedies: some of our users have reported cutting one of the heat sink corners to allow mounting despite the extra tall capacitors. Although this solution is mechanically acceptable, any modification made to the HS will void the product warranty. Here are pictures of such modifications with an Asus A7A266 (thank you toMichael Sukach for providing these images) :
click on picture to enlarge PentiumŪ 4: The MC462 was designed to fit all known PentiumŪ 4 motherboards. Mounting to the motherboard requires bolting a set of brackets onto the heat sink, which allow relocation of the compression springs to meet IntelŪ specifications. Click on the thumbnail to enlarge
Please follow this link Heat sink
Mounting
Fan
Price and ordering: click here Known incompatibilities notes: |
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