Looking for a light weight heatsink that's compatible with both AMD and Intel processor platforms? The Auras LPT-709 heatsink is one such cooler, and it runs fairly quietly too. The LPT-709 comes with a 92mm PWM fan that scales in speed from 800-2400RPM with compatible motherboards. At its fastest speed the fan is moderately audible. Pulse Width Modulation (PWM) compatible fans are noted by their 4-pin power connectors, and what PWM does is enable the BIOS to directly control fan speed so the PC keeps itself cool under load, yet decreases fan noise when it isn't.
Auras' LPT-709 heatsink offers a common approach to cooling, with four heatpipes and smooth aluminum cooling fins. The entire heatsink, heatpipes, aluminum fins and copper base and all have been chrome plated. As a means to perhaps reduce noise levels, the fins of the LPT-709 are bent at slight angles, and the leading and trailing edges given a staggered profile. Furthermore, the 92mm fan is suspended away from the body of the heatsink with four rubber vibration absorbing posts. The LPT-709 weighs in at a light 415 grams, its estimated price is in the region of $40USD.
Auras Technology Co. Ltd. are a ISO-9000 Taiwanese company which was established in 1998 to make OEM laptop thermal solutions for the major brands. The company later diversified into desktop CPU heatsinks, and now produces heatsinks in its' Kunshan factory just outside of Shanghai. Frostytech has recently tested a few other Auras heatsinks, you can find those reviews here.
The Auras LPT-709 heatsink is equipped with soft rubber vibration absorbing fan posts, and a 92mm PWM fan that scales from 800-2400RPM. As you can see in the photo below, the cooling fins also have a bent profile, and staggered edges.
The Auras LPT-709 heatsink comes with two mounting brackets that allow it to be installed on Socket 775 Intel and socket 939/940/AM2/AM2+ AMD motherboards with a minimum of fuss. The brackets screw onto the copper base of the Auras LPT-709 with four screws, and after that installation is a tool-free affair.
Printed instructions are provided, but you won't need them. Faced with a pile of heatsinks lately that use unnecessarily complicated mounting hardware, Frostytech is really pleased to come across any heatsink that makes use of the standard AMD/Intel methods of attaching it to the motherboard.
Base Finish and Flatness
Flipping a heatsink over to inspect the business end is often a simple indicator of overall cooler quality. More practically speaking, a heatsink is in many ways only as effective as the contact it makes with the processor - the flatter and smoother the better. Base finish is one of the criteria that Frostytech measure in the course of evaluating heatsinks, and it involves two distinct aspects. Surface Finish is the first; this is calculated with the aid of Surface Roughness Comparator that has a cross section of common machine surface finishes and their numerical surface roughness equivalents in microinches. The second is Surface Flatness. This is tested with an engineers straight edge or proven flat surface, in two axis.
The base of the Auras LPT-709 has a machined copper base that has been chrome plated. The surface roughness is ~8 microinches, which is considered excellent, and is flat in both axis. There are screw holes around the outside of the base area to attach the Intel and AMD steel mounting brackets.
FrostyTech's Test Methodologies are outlined in detail here if you care to know what equipment is used, and the parameters under which the tests are conducted. Now let's move forward and take a closer look at this heatsink, its acoustic characteristics, and of course its performance in the thermal tests!
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