I'd agree. Also cooling Titan+i7 in a tiny box might be a challenge. But on the other hand Anandtech measured whole system consumption for Titan being 430 watts including a 130+ watt CPU. Drop 50 watts off the CPU and it doesn't sound so bad for a 450 watt power-supply.
edit: Tech Report says 323 watts for whole system in their Titan review, so it's certainly feasible.
Would mass-produced closed loop be a viable solution here? I'd imagine the engineering costs incurred ahead of time would add to quite a bit, but I'm unqualified to make any interesting judgment on any final balance of costs.
edit: Tech Report says 323 watts for whole system in their Titan review, so it's certainly feasible.