(I sent this as an email to support and haven't yet got a reply)
SO I had this problme for a while, ever since ReLive 16.12.1 was released (and continues to happen on 16.12.2), and its where when I restart my PC or sometimes put it to sleep the drivers will break. So, on Heaven Benchmark on the first scene I will normally get 45fps but after the drivers break I get around 10fps and this translates to games. In Overwatch I will struggle to get 30fps and in some rare cases can't get above 5fps.
Specs: i5 6600k O.C 4.5GHz MSI R9 390 Asus Z170 Pro Gaming 16GB 3000MHz DDR4 RAM Windows 10
Please enlighten me with why I am getting this problem.
P.S I posted about this on this forum and didn't get a SINGLE reply, its been about 3 weeks. Thanks.
Reset your BIOS to default settings for next operation (At least for CPU and RAM settings) and make sure that integrated video is disabled
Check your games and benchmarks and if everything's OK,then you may return your overclock back