[QUOTE=wildmedia] Maybe is your CPU a little bit old for the settings you are using?[/QUOTE]
Maybe - it'a a slightly overclocked i5 2500k.
It doesn't matter much if it's low res, high res, uncompressed, mpg4, mpg2 or other codecs. I'm recording to a SSD and it's not my system drive. But that doesn't seem to matter.