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R9 380 in crossfire 2nd card fans run full all the time

Question asked by thanosprime on Sep 24, 2019
Latest reply on Oct 4, 2019 by thanosprime

Just cobbling a cheap gamer for my son with some leftover parts. I put two R9 380 4gb into a Asus M5A99FX Pro R2.0 and the card in the second slot always runs the fan on full. I did a update to the Crimson software and both cards are showing in Wattman but there is no fan control for second card its just greyed out. The fan control for the 1st card is present. When I turned Crossfire on the fans ran normal for about 30 seconds or so then went back to full speed. There was no activity on that card and it wasn't hot at all and the other card was running normally. Nothing else was running on the system. I even swapped cards but still the fans on the card in the second slot just run at max. This isn't a big deal as its just me putting together something my kid can play Fortnite and Call of Duty on something else besides my rig. But I would like to figure this out as these cards ran perfect in Crossfire on my Asrock Fatal1ly 990FX Killer (long gone). I have updated the BIOS and flushed the old driver with DDU downloading up to date Crimson drivers. Any thoughts?


Asus M5A99FX Pro R2.0

AMD FX-8350

Corsair Vengeance DDR3 1600mhz 2x4gb

2 X Power Color R9 380 4gb

Thermaltake Toughpower 750w Gold