900MHz is very slow these days, but it's designed to run, if needed, at 1.4GHz. The bottleneck is probably the 1GB of RAM. It's 18 months old - and at the time it was released, it was a bit faster than most tablets, but it's considered slow these days.
(BTW, "lag" is a very narrowly-defined word - it means "slow internet speed". That's not your problem, it's just a slow device.)
(The Snapdragon 415 is an x64, but the detection software may only be differentiating between 86 and other CPU-types, and calling anything that's 86 "x86". An x64 processor is an 86-type device.)
12-17-2016 03:49 PM