Internally the Desire X is powered by a 1GHz dual-core Snapdragon S4 8255 buffered by 768MB RAM and though you might think the inclusion of that recent Qualcomm chip has the performance zipping along unperturbed -- well, you'd be wrong.
As single-core handsets go, this one was quite brisk, loaded up with a 1GHz MTK 6575 CPU buffered by 1GB RAM that handled the mostly stock version of Android 4.0.4 with ease.