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AMD's SR1 and SR2 box coolers don't use the cooler brackets

TheLostSwede

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With motherboard manuals being available now, I just found this courtesy of ASRock.
The SR1 and SR2 cooler mounts directly to the back plate, with only the SR3 sitting on the cooler brackets. So why use brackets at all?
Also note the custom fan LED header and the fact that the SR3 can also be connected to USB and used with some kind of "settings software".

sr2_1.png sr2_2.png sr3.pngamd_fan_led.pngsr3_2.png
 
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So why use brackets at all?

It's possible that AMD still use the same Wraith cooler from AM3+ (only change the fan with the RGB one) and they don't want to change the mounting system on the Wraith cooler so the bracket stays.
 
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