Normal
It's overclocked core i7 and yes it has 4 cores with ht so 8 threads totally. Believe me my CPU is more than enough for any kind of ffdshow processing and GPU has nothing to do with that, it's pure software process. I'm using modified multi-thread AviSynth. 35% is with AviSynth script only enabled, without is ~%3. I didn't check SD movies because this kind of script is useful only for HD. Read Guru3D forum to see what it exactly does but basically it makes any movie play at 60fps by putting fake frames so video is very smooth and synchronized with display refresh rate.