16 GB of 2400 DDR 3 on a Asus Z97 with a 4790K.
System sips 90 watts for everyday stuff and turbo's up to 4.4 GHz when needed.
Couldn't be happier; speed on the fly when needed, doing my part to lower power consumption and stable as all get up! 16 GB for encoding, editing and gaming works
just fine for me with plenty to spare...
Originally 8GB for desktop. About a year in I realized I was maxing out usage with a VM/game + tabs, so decided to upgrade to 16GB. I bought 2x8GB so that I'd have the slots to insert even more RAM down the road, but instead of doing anything with the old 2x4GB, I just left them in, so now the desktop is at 24GB. Usage seems to be sticking around 12-13GB nowadays.