These fans seem great based on Revain's ratings and the number of stars this product has. Installing them was a whole different story! I believe the phrase "you get what you pay for" works well here. I wanted to use these fans to replace worn out fans for my liquid cooler. After installing and closing the case, I prepared a test to see how the fans were cooling my heatsink. When testing my computer with Red Dead 2 as it is the most demanding game for my CPU, my CPU temperature was 100°C at max performance for that game. That's insanely high for liquid cooling with an Intel i9 9900k. Before I replaced anything, my temperatures were pretty chilly, around 80C at the highest. To be honest I didn't understand what went wrong? I figured it was me or my reapplying thermal paste to my cooler. Thinking it was my fault I reworked the ENTIRE liquid cooling system just to retest and show the same high temps. FINALLY tired of the impasse, I removed my front cover and IMMEDIATELY the system started reading lower temperatures. I put my hand in front of the fans and they really felt like they were blowing all the hot air from the heatsink back into the case instead of out! I was confused! After seeing the fan air direction from the manufacturer, I correctly set the fan direction to exhaust, but despite the fact that the fans felt like they were blowing in rather than out. Not worth all the trouble. Try to buy better fans from a more reputable and reliable company. You get what you pay for here, which isn't much. Would NOT buy again.
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