Ancient? It’s only like 5 years old 🤓😂😂 which I guess is a long time for hardware.

Assuming there is no budget and that both Kits are running the same speeds and latency, I would say 2x24gb

Air coolers are old tech nowadays, there is no reason to use them as AIO’s are cheap enough to where the cost factor isn’t that bad and water cooling is just better technology. All the heat gets dissipated to the radiator instead of blown into the case like an air cooler does. Plus you don’t get the loud arse fans on the air cooler that ramp up.