@Sijnk In the main thread there were a lot of temps posted, but maybe it's time to collect all of them!
If you are interested in some test in particular, just ask!
But in short, a 240mm Radiator can definitively keep cool fine a 3950X (-0.05v) and a Titan V, stock for even long time intense load test or task.
SO:
PART 1 Temp -
Blender Benchmark+FurMark
3950X Stock+Titan V Watercooled at the same time - 2 Slim Noctuas
PART1 Temp -
V-ray Rendering session
3950X PBO Enabled- 2 Slim Noctuas at 70%
Here regarding the PART 2:
PART2 Temp -
Blender Benchmark
3950X PBO Enabled+Titan RTX on Air+Titan V Watercooled - 1 Noctua F12 ONLY
PART2 Temp -
Blender Benchmark+FurMark on Titan V
3950X Stock+Titan RTX on Air+Titan V Watercooled - 1 Noctua F12+1Slim Noctua BOTH at 70% Max
PART2 Temp -
Blender Benchmark 30MIN
3950X Stock+Titan RTX on Air+Titan V Watercooled - 1 Noctua F12+1Slim Noctua BOTH at 60% Max
PART2 Temp -
Heaven 4 Loop 30MIN on Titan V
3950X Stock+Titan RTX on Air+Titan V Watercooled - 1 Noctua F12+1Slim Noctua BOTH at 60% Max
PART2 Temp -
Blender Benchmark+FurMark on Titan RTX
3950X Stock+Titan RTX on Air+Titan V Watercooled - 1 Noctua F12+1Slim Noctua BOTH at 65% Max
PART2 Temp -
EVERYTHING STRESSED AT THE SAME TIME - GPUs, CPU, SSDs
3950X Stock+Titan RTX on Air+Titan V Watercooled - 1 Noctua F12+1Slim Noctua
PART2 Temp -
Blender Benchmark with DDC 6W Pump
3950X Stock+Titan RTX on Air+Titan V Watercooled - 1 Noctua F12+1Slim Noctua BOTH at 70% Max+1 A9 above the SSD and Chipset
PART 2 Noise
Here you can check the DB noise level. The GPU side is louder, because the fans are against the mesh panel.
So, one suggestion is to keep the case if you can, on the right side of your desk!
And a video did trying to "show" the noise under stress of my system inside the T1.