Those temps are reasonable for a 4.4 Ghz OC on a 2500k. BF3 stresses the GPU so im sure your case gets a lot hotter than just stressing the CPU. Max Tcase is 72.6°C Im not sure what temps your reporting but Tcase will be about 8-10c lower than the core temps so max core temp around 80c. In any case your not close to hitting the max temps so you should be fine.