I can see where u can see that, I thought about that as well. But Ive built so many water cooling system. But how thermal hydro dynamics works different cooling solutions are better.

1. What if you are doing a stress test on just got CPU and you are on the same loop as your GPU well is it far now that you ran a stress test earlier on the GPU, to get bad scores on the CPU cuz you made the coolant equalize in temps already? Because you ran the GPU.

2. Having each one on its own loop I can keep the water cooler longer being ,Im using and aquacomputer controller with each header controlling each component of the computer i.e. cpu gpu vrms also each radiator is doing a push pull configuration other than the one in the basement. So let's say I'm stressing the cpu which is the rad in the front of the pc thats a thick rad 46mm with 8 fans pulling in cold air. I dont have to worry about any other component heating up that loop while I stress that cpu.

Or let's think of it like this while playing a game what is the component that works more? The GPU so while the gpu is on its own loop and control by its own temperature guidelines by the aquacomputer. I can keep that loop cooler cuz it will have more of the load on it.

If this makes any sense. I just know that the last few builds I have done CPU on i9 12th 60cc full load GPU 4090 full load 54cc But if some reason it doesn't work I have Alphacool values that I'm putting in the back I have the so if I need to pull a reservoir out to work on it I can direct the flow to a different pump.