Hello

I got Dell Inspiron 7577 FHD version and I had an issue that it was overheating so I solved the issue by downgrade the BIOS to 1.9.3 and I was able to undervolt this machine but now I'm facing another issue and that it stutters after 30 minutes of playing and I noticed that the GPU usage drops to 0 sometimes and it normally stays between 70&80 I don't know why it doesn't work with full power and sometimes it gets to 99% while the CPU stays below 80% and that is causing the stutters I guess .. I'm sorry if my english isn't that good but I tried as much as I can to explain what is happening with me, can somebody please help me fix this issue?

Thanks