Since you have a solid GPU and plenty of storage, we need to find the bottleneck.
Run Task Manager while your game is lagging and monitor these four: CPU, GPU, Memory, and Disk Usage. Whichever one is hitting 100% is likely your issue.
Also, don't rule out thermal throttling. Laptops can overheat, forcing the CPU/GPU to slow down. Use a tool like HWMonitor to check your temperatures while gaming. If they're consistently above 85-90°C, that's your problem right there.
I'm not an expert but this is what i would start with. Hope this helps you track it down!

引用自 The Governor：

Since you have a solid GPU and plenty of storage, we need to find the bottleneck.
Run Task Manager while your game is lagging and monitor these four: CPU, GPU, Memory, and Disk Usage. Whichever one is hitting 100% is likely your issue.
Also, don't rule out thermal throttling. Laptops can overheat, forcing the CPU/GPU to slow down. Use a tool like HWMonitor to check your temperatures while gaming. If they're consistently above 85-90°C, that's your problem right there.
I'm not an expert but this is what i would start with. Hope this helps you track it down!

So... 6% - 10% CPU 37 Memory 0% Disk 0% Network

What about gpu usage? if its low, like 10-20% while the game is lagging then that helps narrow it down. Also monitor temperature too.
Incase the gpu usage is low heres what could be happening;
Software Limiters (like V-Sync or a low FPS cap), or background processes interrupting the CPU, or driver issues causing poor communication between the CPU and GPU (in which case i'd recommend a full clean install of the gpu drivers)