I feel the need to clarify my previous post. I did not mean to imply mine crashed too. I was simply commenting upon the level of "intensity" of hardware RIFT's new patch going F2P seems to possibly be related. I.e. Even non boxers have mentioned seeing hardware requirement increases.

Perhaps the i5 youre using isnt able to keep up. Perhaps the video card is not cooling as well as it was when you first bought it. Perhaps your computer has more bloat on it now than when you started, and requiring more RAM resources. Perhaps the amt of RAM used now, is insufficient.
(Note: I also am using close to 12GB for 5 instances at a fps of 30)

Either way, all the "perhaps's" are indicative there is more investigating into the PC rather than pointing at the software.

/agree with Mirai