Question Same project runs at 400 FPS on desktop, 40 FPS on Laptop that has better specs?

I am lost, I have a simple prototype that uses cubes and capsules, 4-5 on screen at the same time, thats it.

As expected, on desktop computer it runs at 400+ FPS, but on my laptop (with a 4090) it runs at 40 FPS. I can run all the latest AAA games on Ultra without any issues on this laptop. What could be causing this? It's the same project.

profiler on laptop:

 

usually laptops have a mobile version of the card, so dont actually perform at the same their desktop counterpart of the same name would make. So it could be a little to do with the card in the desktop, however 10x? seems a lot.

vsync is work of the devil, make sure its disabled. It looks possibly enabled in your graph although lots of colours are similar hue and murkey colours IMHO by default.

Your laptop may also be throtelling due to power, heat etc. desktops dont tend ot that

 

Just a glance at the stats window seems to indicate that the game is CPU bound, so the GPU wouldn't matter much. Your laptop CPU is likely running at a lower frequency, with fewer cores and cache than the desktop CPU.

Also to be sure, run a gaming benchmark on both machines to see whether both machines actually do have the performance difference in the offset range that you expect them to have.

 

It's likely some combination of these two. A laptop is a very small form factor so manufacturers will often priotize the throttling, power delivery, and cooling of one component over the other. Cooling components like fans and heatsinks are typically shared, and in some cases the heatpipes used to transport heat to them are shared too.

 

Also check the power settings, it should be on "maximum power" instead of "balanced" or "battery saver". Or something like that. And only use it plugged in.