Temps in my part of Los Angeles suddenly dropped to 6C last night, allowing the coolant to drop to 10C. Dew point of 3.7C so little risk of condensation, I decided to dial it up to 11 and see what the current tuning can do.
First run on Time Spy Extreme gave me my best score so far. There's still some additional wiggle room to make some more improvements to the system as well, but I think I'm pretty close to the ceiling of what this rig can pull off before needing to upgrade some parts.
Just happy I could hit 20K and make top 20 for my CPU/GPU combo.