both are running around 40 to max. 65 degrees celsius. Is there any other reason for it to lag that much? my drivers are update btw.You might want to get a temperature monitoring program like HW Monitor:
HWMONITOR | Softwares | CPUID
HWMonitor for Windows® x86/x64 is a hardware monitoring program that reads PC systems main health sensors : voltages, temperatures, powers, currents, fans speed, utilizations, clock speeds ... The program handles : CPU and GPU-level hardware monitoring...www.cpuid.com
I suspect that the CPU or the GPU or both are throttling. Case cooling issue? Try a open case to see if it runs cooler?