When I had my T3500 Precision workstations running on W7, I also had a Precision laptop. When I upgraded to W10 and Precision T5810, I got another Precision laptop. Has 16GB RAM, 5GB video card, NVME storage/drive, UHD display, and 3-year warranty, just like a new one. Cost $350... would have cost $2,500+ if new.
get into task manager and see what's running. Go into BIOS and make sure your RAM is clocked to its rated speed. You've got to have some serious bloatware.
So this is something I learned today in Windows 10 and 11. Under the various power settings (balanced, higher, power saver) there are options you can choose. One is CPU speed. Under the non-highest settings, the CPU can drop to just 5% of its max speed. You can also set the maximum CPU you want to use. The power savings can be modified at each specific component. If you are having issues, check to see if this is where the throttling is. It could be in the power management. (like a car that has auto shutoff at red lights)
So is the computer much faster than the 8 year PC? I'm still using my 8 year old as new Pc are probably only 30% faster
no bloat ware on a precision (except for the bullshit Windows puts in like Game Pass and Freecell).
The task manager and resource monitor have shown zero spikes up to 50% let alone higher which is weird.