I would question how you have 10GB, that isn't a norm. Normally it be derivatives of 4; 4GB, 8Gb, 12Gb, 16, etc. Make sure you have PAIRs of RAM btw, if you don't have matching pairs that can cause cycling on the RAM as it unloads and loads the next batch of Data, which is why we do it in PAIRs of RAM sticks.
Otherwise sounds typical, as your playing online, anything can happen to cause more demand, but if the triple buff is helping more (that doesn't happen) then you need to stick to triple buffering as the Card is outputting more data then you screen can handle it would indicate (note what I said above).