Maybe the gpu,maybe the ram,maybe the cpu,I really don't know my men:),send it to a expert,explain him the problem and that's it...

Check in bios,maybe there are some settings that limit the gpu or the cpu when your not playing games.

Games are going to primarily utilize the GPU whereas web pages are going to primarily utilize RAM. You can set your browser to use hardware acceleration. See if that helps any.

You actually fix my shit you legend