It depends.....HT takes the 920 from 4 to 8 cores .... which means the CPU is working harder. At the same OC, running w/ 8 cores will take your temps as much as 10C higher than running w/ 4 cores.
My son uses an "everyday" OC profile at 3.7 GHz and has HT and all other BIOS features at default settings . At a vCore of 1.125 volts, his core temps are in the mid 50's. He has a "gaming" profile at 4.2 GHz which he uses to play some demanding games as they don't take advantage of 8 cores and by turning off HT, he was able to score the 4.2 and still keep CPU core temps in low 70's. He has yet another profile at 4.4 Ghz with HT on but it involves turning off or adjusting a lot of other BIOS features.