Large Aluminum Heat Sink 2.71"x2.71"x1.41"/ 69x69x36mm Heatsink High Power Cooling Plate 27 Fin Radiator GPU Cooler IC Module PC Computer Led PCB Charger Electronics Amplifier

Very handy heatsinks, nicely made and goes well with my Mac Mini and SSD drives. I use the heatsinks along with an aluminum 1/8" thick base plate to cool down my computer setup. They really help to lower the equipment temperature and keep them running below 85 degrees F. Well worth the value investment.

The fin count and fin aspect ratio of this heatsink is impressive, especially to us old-timers that remember a time when heat sinks with this high a surface-to-volume ratio had to be made by edge-embedding sheet fins into a milled-slot carrier.I found a dimensionally-similar (2.581" wide instead of 2.71", 1.340" tall instead of 1.41" tall) heat sink in an online AAvid catalog, model # 83220. The AAvid heatsink specs were 1.01 oC/W/3in (still air), so I'm expecting this heatsink could be 10% better (lower). Note that if you bought a length other than 3", the thermal resistance does not scale linearly with 1/Length, assuming a centrally located thermal point source. For the 15.75" length I'm using, the improvement is only a 50% reduction in thermal resistance.Also note that the thermal resistance decreases (improves) with moving air. While the documentation I found for the #83220 did not provide thermal resistance versus air flow, I found another AAvid catalog and heatsink #72070 (dimensions 3.008" wide, 1.02" tall, similar fin aspect ratio, 1.4 oC/W/3in) that provided a thermal performance versus airflow table; for a modest airflow (quiet muffin fan) of ~700 LFM, the thermal resistance drops by about another 70%.Net result, for the 15.75 inch length option, operating with 700 LFM forced air flow, is expected to be about (1oC/W/3in * 90% * 50% * 30%) = 0.14oC/W. My heat source is distributed along the 15.75" length, rather than being a point source in the center, so I expect the actual performance to be 2-3x better (lower resistance) than the above calculation.One final note, the fins on these heatsinks are thin and quite prone to bending, especially the outermost vanes. These arrived well-packed in foam sheets inside a custom-sized cardboard boxes, and only one of the four I purchased required any straightening of the fins.

Nice heat sink. Ample room for two SSRs

Readily machined. I used it on a resistance box that I built with four 100W resistors that takes 96.25% of the load of my 50W Marshall ORI50H and turns it into heat. It goes Marshall, resistance box, 100W L-Pad attenuator then Marshall 25th anniversary 2556AV slant cab with two Celestion Vintage 30s. The resistance box was to allow me to turn the Marshall ORI50H to full volume but be able to comfortably talk over the fully loaded JJ EL34s with the attenuator being more mid scale. Without the heat sinks, the resistance box approached 400°F, way too hot for electrical components and a burn hazard for the tolex and me. With the heat sinks arranged with the fins aligned vertically for natural aspiration, the resistance box operates below about 135°F (with the fins around 130°F) with the attenuator L-Pad more midrange, as opposed to barely being turned up.

This is a great little heat sink it has great heat dissipation. If you are using a cooling fan the air flows through easily. There is plenty of cooling power. 👍

This was highly effective at taking the temperature down on my Sabrent 2-bay SSD enclosure.

Excelente buen disipador buen acabado

Lots of surface area...Gotta make your own mounting standoffs to keep up and air moving all around...works well