Comparison between BF4 and dx11.1 environments
Comparison between BF4 and dx11.1 environments
It seems your CPU overclock might be causing instability and poor performance in DX.
I've been tweaking this for two years. Ran a prime for 15 hours after initial testing to check stability.
Even with a top-tier CPU, Mantle seems capable of handling the BF4 engine background data more efficiently than DX11. It may not be perfect for everyone, but when it functions, it performs well.
Are those 50fps a typical rate or just a rare sight? Those spikes to 300fps when nothing is in view likely skew the average. The best insights come from the lowest numbers, since they matter most.