HTC One (M8) Prime version is said to have a Snapdragon 805 APQ8084 SoC with a quad-core Krait CPU. It is also reported that HTC One Prime would have Qualcomm’s latest MDM9x35 multimode modem. And it would have 300Mbps downlink capacity and 40 MHz for FDD Category 6 and LTE TDD versions.
Unlike the HTC One Mini 2's rumored camera, HTC One Max would have the same depth sensing dual camera as present in current HTC One M8 smartphone. It would have an 18MP shooter at rear and 5MP at front with 3GB RAM and 16GB internal memory.
HTC One Prime is said to launch officially in September 2014. The above specifications are taken from a prototype of the smartphone that is currently under testing.