Update = After verifying ownership and completing troubleshooting, a DELL agent setup service.
Hi. I have an alienware m15 R6, RTX 3070 i7. Basically, after a few minutes playing any game that use the GPU, the FPS drops drastically. I'm tempted to consider that the problem is the GPU, more precisely, the power management from the GPU. This is why: -CPU has the temperature around 90~100 °C and clock ~4GHz all time. It doesnt drop.  -When i open any game, its energy is around 125W. Temperature 83°C. After a few minutes, the energy drops to 45W, temperature goes fastly to 70°C. Here is two pictures (before, and after the drop). Im playing Rainbow six siege, but it happens with any game. [IMAGE] [IMAGE] So, my theory is FPS drops because the laptop, for any reason, reduces the energy for the GPU. Why? I see 3 possibilities:1)The 240W power adapter isnt adequate for a laptop like this. Maybe the 330w would be better? But the problem with that is: why not everyone is claiming that problem? And others laptops are being sold with the 240w too.2) Its software a bug. For any reason, the laptop understand that the battery is being drained too fast, and reduces GPU energy.3) Its a hardware bug. Battery, GPU, the power adapter. Considerations: I already did any test possible. All my drivers is updated. Im already in communication with the support of my country, and probaly, monday ill decide what ill do. So, what is my objective with that post? To debate with you, and see if anyone else is facing that problem right now. And with that, see if i can find any solution that doesn't need to send my laptop to them. 
m15 R6, FPS drop