That might work with just one card but I would think you need some air circulation inside for the other card. I only have that one GPU radiator and have all front fans as intakes.
Yeah, it seems to be impossible to solve. Either i make the one GPU rad as exhaust, but then it will be sucking in the air inside the case, that would be warmed up by the other air-cooled card, or i will make it as intake, which will then blow the hot air inside the case, making it worse for the air-cooled card. Catch 22
I think i will be going with CPU 420 rad as intake then, since the CPU will produce less heat than GPU. Its 7950x and i may even run in one of the lower wattage modes, we shall see. Additionally, in situation when both GPUs would be rendering, CPU will be only lightly loaded, so there should not be blowing hot air inside the case when both gpus are under load.
The question remains whether i place the CPU rad up top or in the front (and then GPU rad as exhaust in the other position). Front would be probably better, but it will be waste of those rgb fans.
EDIT: Can i replace the stock fans on the GPU radiator for different, RGB ones? For example for 2 of these:
Ventilátor do PC ARCTIC P12 PWM PST A-RGB 0 dB Black na www.alza.sk. ✅ Bezpečný nákup. ✅ Všetky informácie o produkte. ✅ Vhodné príslušenstvo. ✅ Hodnotenie a...
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I think these are the same type that is mounted on Arctic Freezer AIOs, so should be good for rad. Not sure if better than the stock MSI ones though.
EDIT 2: OK, made 3 diagrams, help me pick the best one pls