I just acquire 10 days ago an R11 with 3080 and i7-10700F (watercooled). Perf are there and I don’t get stutter. I’m running on a Dell Ultrawide 3415W (3440x1440). About temp, the fan on top of the case blow a huge amount of hot air and I will have to move the case somewhere else than under my desk 
for the hot summer season.For now, I limit fps to 30 via VSYNC ON in MSFS to avoid CPU/GPU to perform at full speed
Because I start playing with scenery/bush developpment and as I’m a video addict, I had 4 Tb of SSD and HD and an extra 16 GB of Ram (total 32GB)