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Topic: Heatsink

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April 7

	Heatsink and Watercooling Roundup
		First, understand what C/Ws are telling you: The difference between a heatsink with a C/W of 0.30 and 0.35 is 5 C at 100 watts under stress.
		Closely ranked heatsinks may show little or no difference on a motherboard, due to secondary heatpath effects which are not captured in these rankings.
		Heatsinks tested prior to September 2001 were newly tested during December 2001 on the Die Simulator.
	www.overclockers.com /articles373 (958 words)

	DIY Heatsink
		Because your heatsink is made from many separate pieces of aluminium, it is possible for it to assume many different and entertaining shapes, within the constraints of the threaded rod.
		Once the heatsink sections are drilled and tapped to accept the top and bottom covers, the heat spreader has been drilled and tapped for the transistors, and no further work needs to be done in that area, you may start the final assembly.
		Heatsink temperature was taken as 60°C, at an ambient temperature of 25°C. Even using the worst case figure, this means that when dissipating 80W (as discussed at the beginning of this article), the heatsink temperature will stabilise at around 20°C above ambient (45°C at 25°C ambient)...
	sound.westhost.com /articles/diy-heatsink.htm (3482 words)

	ESP - Heatsink design and transistor mounting
		Transistors must be mounted as close as possible to the heatsink side of the bracket, since the aluminium is not a perfect conductor, and the smaller the distance the heat has to travel the better.
		Most high performance heatsinks have the surface of the fins ribbed, which further increases the surface area, so even a relatively small heatsink will have a radiating surface far greater that its moderate size would indicate, after all the individual fins, and the ribbing on the fins, is taken into account.
		Unless the heatsink is facing a hotter surface nearby, it is imperative to have the heat sink surfaces painted or anodised to enhance radiation.
	sound.westhost.com /heatsinks.htm (11074 words)

	What is heatsink? - a definition from Whatis.com - see also: heat sink
		- A heatsink is a device that is attached to a microprocessor chip to keep it from overheating by absorbing its heat and dissipating it into the air.
		In Intel computers, the heatsink is positioned either on top of the microprocessor (in computers with a ZIF socket) or on the side of it (in later Pentiums in which the microprocessor fits into a Slot 1 interface).
		To ensure that the heatsink can absorb as much heat as possible, thermal grease is used to create a seal between the two devices.
	searchsmb.techtarget.com /sDefinition/0,,sid44_gci815999,00.html (322 words)

	heatsink - a Whatis.com definition
		A heatsink is a device that is attached to a microprocessor chip to keep it from overheating by absorbing its heat and dissipating it into the air.
		In Intel computers, the heatsink is positioned either on top of the microprocessor (in computers with a ZIF socket) or on the side of it (in later Pentiums in which the microprocessor fits into a Slot 1 interface).
		To ensure that the heatsink can absorb as much heat as possible, thermal grease is used to create a seal between the two devices.
	whatis.techtarget.com /gDefinition/0,294236,sid44_gci815999,00.html (241 words)

	Ars Technica: The Ars guide to advanced cooling: Heatsink Edition - Page 1 - (6/2000) (Site not responding. Last check: 2007-10-15)
		Heatsinks are the most basic form of cooling next to simple surface convection in today's PCs.
		While there are different ways of manufacturing heatsinks, and different philosophies in the way they are shaped, the idea of all of them is the same: increase surface area to increase heat dissipation.
		Now, the most important factor in a heatsink is, naturally, its ability to dissipate the largest amount of heat in the shortest amount of time.
	arstechnica.com /guide/cooling/heatsink-1.html (1197 words)

	Glossary Search Results
		Heatsink - A device that makes contact with a microprocessor (or other object in need of cooling) and removes heat by exchanging it with air in a more efficient manner than the flat surface the heatsink is attached to.
		It is common for a fan to be mounted onto a heatsink to increase the efficiency of heat exchange by blowing cooler air through the fins on the heatsink.
		The heatsink draws heat away from the processor, and the fan expedites the removal of the heat by moving air across the heatsink.
	www.geek.com /glossary/glossary_search.cgi?heatsink (317 words)

	Heatsinkbikes.com - Welcome
		The vital braking performance is ably taken care of by Blue Heatsink Magura Pads front and rear, and the effects of frame flex in the rear braking mounts has been minimised by the fitment of a Heatsink CNCed 4-bolt booster.
		Heatsink are very proud to present BMX team rider John Bludell's first video since he equipped his bike with team issue CNCed Heatsink Vees.
		Heatsink are proud to have supported Lee right back at the emergence of our pads, when each one was individually and lovingly hand cut!.
	www.heatsinkbikes.com (8363 words)

	Clean a laptop heatsink - Guide - Short-Media
		(A digital thermometer was used to measure the temperature at the base of the heatsink.) After cleaning the heatsink and removing the layer of dust on the fan shroud it now operates at a temperature of 51 degrees Celsius under full load with a variance due to ambient temperature.
		If the CPU heatsink is removable from the processor then it may be washed with warm water.
		If the CPU is not affixed to the heatsink then clean the heatsink surface and the CPU die with some isopropanol alcohol soaked cotton swabs to remove any residue of the old thermal paste.
	www.short-media.com /review.php?r=258 (1382 words)

	Mikhailtech - Ultimate Heatsink Roundup - Part 2 (Site not responding. Last check: 2007-10-15)
		Another explanation may be that the copper plate doesn't transfer the heat to the aluminum heatsink, but it doesn't seem to be the case because the aluminum was warm when I touched it.
		I've tested the heatsink with the Delta fan to give you a better idea of how good the heatsink is, but for those of you interested in the performance with the Papst fan, here it is: 41C full load and 32C idle.
		The heatsink is made of a 77x77x39mm pure copper base, very well finished, with a margin of error of 0.01mm.
	www.mikhailtech.com /articles/cooling/ultimatehsf2 (2960 words)

	Innovative Heatsink Enables Hot Uplinks
		As a result, the usefulness of extruded aluminum heatsinks for cooling high-power electronics cooling applications was extended into the next generation of electronic upgrades.
		Unlike bonded-fin heatsinks, the hybrid-extrusion heatsink is neither composed of nor constructed from multiple components, and is not subject to any long-term thermal performance degradation due to either failure or weakening of the epoxy interface between the baseplate and fins.
		The process of choosing heatsinks for high-power-density electronics used to be a simple process — open a catalog and choose a part that would come close to meeting the requirements.
	powerelectronics.com /mag/power_innovative_heatsink_enables (2026 words)

	Desktop Boards - Proper Installation of Boxed Pentium® 4 Processor Heatsink
		Below is a procedure you may use during initial installation of the heatsink to ensure the thermal interface material stays intact, however, after you have installed the heat sink once, you will need to use an alternate thermal interface solution.
		When installing the fan heatsink and clip assembly, it is important to not allow the heatsink to rotate or twist on the processor.
		Securing the fan heatsink while closing the clip levers will ensure the thermal interface material is not damaged enabling the thermal solution to operate correctly.
	support.intel.com /support/motherboards/desktop/sb/cs-009046.htm (380 words)

	Mikhailtech - Swiftech MCX-370 Heatsink Review (Site not responding. Last check: 2007-10-15)
		I got the heatsink with fan and washers installed and a foam block taped to the bottom to prevent scratches on the "belly" of the unit.
		For the most part the heatsink remains the same, there is no major difference (still looks generally the same).
		This is achieved because the fan is no longer in direct contact with the heatsink, and the rubber absorbs a great deal of the produced vibration.
	www.mikhailtech.com /articles/cooling/mcx370 (1576 words)

	[H] Enthusiast - Heatsink Comparison
		Basically, a heatsink is designed to exchange the heat from the CPU from one medium to another in this case from the heatsink material to the surrounding air.
		The only benefit of having a heatsink made out of silver or some alloy, is the fact that due to the better heat transfer the heat is drawn from the CPU faster, thus you can use a smaller heatsink and get the same performance.
		This is the reason why heatsinks always have fins or pins, they increase the surface area of the heatsink, the bigger the surface area the better the heatsinks performance.
	www.hardocp.com /article.html?art=MjEy (1445 words)

	Heatsink Physics Guide
		In cases such as these, it is beneficial to have the fan suck the air out of the heatsink, as the shroud causes air from the bottom of the heatsink to be pulled up.
		Depending on the design of the heatsink and the airflow patterns that result from it, the only thing you can do is try both ways to see which works better.
		If the fan is going to be pulling air out of the heatsink, the airflow patterns will take the path of least resistance, and as these fans aren't terrible powerful, chances are that the hottest air (the air closest at the very bottom) will not be moved effectively.
	www.firingsquad.com /guides/heatsinkphysics/page4.asp (775 words)

	Heatsink - Dev Shed
		This means he was trying to remove the glue (or whatever it is) that was on the bottom of the heatsink.
		You MIGHT be able to put the heatsink on as it is...
		So yes it is vital part of processor and heatsink, although you could start computer and see what temp you get on cpu, and if it is uhmm...
	forums.devshed.com /beginner-programming-16/heatsink-26428.html (598 words)

	Intel Stock Pentium D Radial Curved non-Bifurcated Fin Heatsink Review - FrostyTech.com
		In this review, Frostytech is going to evaluate the stock heatsink model that accompanies most Intel Pentium D processors.
		The stock Intel Pentium D heatsink is composed of two sections - the first is the outer extruded aluminum donut of 23mm long cooling fins, the second is an internal 41mm diameter cylindrical copper heat spreader.
		The technique of building heatsinks with copper centers and outer aluminum cooling fins has long been used to transfer heat energy from the CPU, disperse it through the copper component to an increased surface area, and from this larger total surface area to specially shaped aluminum cooling fins and the surrounding environment.
	www.frostytech.com /articleview.cfm?articleID=2025 (566 words)

	MOSFET Cooling \| Enhance MOSFET Cooling with Thermal Vias - mosfet cooling
		The package may be mounted on a heatsink or chassis, which allows for efficient removal of heat energy from the device.
		One disadvantage is that the assembly of the device and the associated insulating material or heatsink compound may be labor intensive.
		The heatsink can quite often be the chassis of the vehicle being driven, such as the cast-iron body of a forklift.
	powerelectronics.com /thermal_management/heatsinks/power_enhance_mosfet_cooling (1904 words)

	Processors - Replacing the Boxed Processor Fan Heatsink
		If you own a boxed Intel® processor, the fan is covered by the 3 year limited warranty.
		Installation and warranty information for third party fans and heatsinks should be available from that manufacturer.
		If there is a concern as to why a heatsink does not have a dedicated mechanical fan, contact the system manufacturer.
	www.intel.com /support/processors/sb/cs-001609.htm (186 words)

	Dynatron BH-610 60mm Ball Cooling Fan/Heatsink - Retail at Newegg.com (Site not responding. Last check: 2007-10-15)
		This heatsink came with a piece of scotch tape over the thermal gunk and of course when this was removed, so was the grease.
		My previous heatsink was all aluminum and had a 60mm fan aswell.
		I was using this heatsink to cool a AXP 2100+ that was running very hot (58C).
	www.newegg.com /app/ViewProductDesc.asp?description=35-114-011&depa=0 (468 words)

	Alpha P125C Heatsink Review
		The Alpha line of heatsink first came into the American end-user with the overclocking craze, led by the Celeron 300a.
		Manufactured in Japan by Alpha Company Ltd. these heatsinks are constructed of Aluminum an are characterized by their large and dense heatsink fins.
		The Alpha heatsink we are testing is the P125C series, one of the smaller heatsinks for slot 1 CPU's.
	www.firingsquad.com /hardware/alphaheatsink (484 words)

	AMD Athlon xp running @ 1ghz,, is this heatsink/fan setup ok ?? - PCApex Forums
		The heatsink fan was old and worn causing a temperature rise.
		The copper shim was a aftermarket piece to aid in keeping the heatsink level with the cpu die.
		Because without the shim the heatsink could be installed on a slight angle and not give good thermal transfer between the two pieces.
	forums.pcapex.com /heatsinks_fans/79338-amd_athlon_xp_running_1ghz_is.html#post551747 (670 words)

	Aware Magazine- Socket A Heatsink Roundup. PAL 6035, HedgeHog-238M, FOP38!
		The heatsinks that WERE available and safe weren't good enough performers to handle the high voltage/high-heat characteristics of an overclocked AMD CPU.
		Now that the heatsink safety issue has died down a bit and the Duron and Thunderbird platforms are maturing and really catching on (Micron is shipping Duron systems!) we thought we'd take a good hard look at a couple of top-performing heatsinks.
		I always apply the putty and place the heatsink on the top of the CPU core first, I then move it around slightly to even the paste out and get a thin layer, which leads to better thermal transfer.
	www.awaremag.com /hardware/socketa_1.html (674 words)

	Socket A Heatsink Roundup 1201 @Aware Magazine
		Over the last couple of months we've rounded up a couple heatsinks from several manufacturers, a couple of these manufacturers are well known while others are just breaking into the market.
		The current roundup only contains 5 new heatsinks from three manufacturers but there are a couple in the bunch that should definitely be considered when making a new heatsink purchase.
		This platform should give a stable base for all heatsinks to be tested and the comparisons between heatsinks will even be better.
	www.awaremag.com /hardware/sink1201/socketa_1.html (653 words)

	Amazon.com: Startech P2 Slot 1 Cpu Fan Heatsink Withtwin Fans: Electronics (Site not responding. Last check: 2007-10-15)
		The StarTech.com Slot 1/A Pentium II/Athlon CPU cooling fan is a combination heatsink and fan designed for cooling Intel Pentium II CPUs that use the original SECC plastic cartridge (233-400 MHz), or AMD Athlon CPUs.
		It sports an extra-large heatsink and twin motors for PCs that are running in hot conditions, or are used for heavy processing.
		Power is supplied to the fan using a 3-lead TX3 connector that plugs into the motherboard and allows the system to monitor fan speeds and operating status, and a LP4 hard drive power tap power the second fan.
	www.amazon.com /Startech-Slot-Heatsink-Withtwin-Fans/dp/B00006B8BW (472 words)

	AnandTech: Heatsink Guide - The Basics of Cooling & Heatsink Technology (Site not responding. Last check: 2007-10-15)
		The first x86 CPU in which a heatsink was recommended (but not necessarily required) was the 486DX2-66.
		To make it simple, a heatsink is nothing else then a strangely formed piece of metal.
		However, conduction is the effect that's responsible for the heat transfer from the CPU to the heatsink.
	www.anandtech.com /showdoc.html?i=1115 (551 words)

	PCR Technologies - Heatsink, Heatsink Fabricators, Heatsink Bonding, Heatsink Printed Circuit, Heatsink to PC Board ...
		Today we specialize in the fabrication of circuit card assemblies: printed circuit boards laminated to heatsinks (heatsink to PC Board bonding) utilizing a variety of material combinations.
		We also supply customized adhesives preforms cut to the proper form factor for heatsink to PC board bonding, heatsink fabrication complete with plating, and we provide silk screening and heatsink to printed circuit board laminating and assembly services.
		With our demonstrated ability to utilize exotic laminating materials, heatsinks and adhesive preforms with small cross sections and rigid tolerances, we hold circuit card assembly flatness to specifications far exceeding original drawing requirements.
	www.pcrtechnologies.com /aboutpcr.html (354 words)

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