I also had a retail QX6700 cpu, It also could not do 4.1, The reason they crash with 4.1 apps which I don't run, Is that they weren't designed with 4.1 in mind, As 4.1 did not exist back then, The highest that existed was SSSE3 and that's what I use, I also have a Q9300 M1 cpu and It's one of...