Far Cry 4 very laggy with R9 380?

MrAlecfrey

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Oct 10, 2015
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I recently got a gigabyte r9 380 for my 6600k build.

Far Cry 4 worked great, but I logged in the other day and it was very laggy. Under 30fps.
Every other game (JC3, GTA 5) works great.

Why is this?