@Lulu you stream using x264 on an fx8350? That's kinda surprising to me. Maybe piledriver holds up more today than I thought....FWIW I stream using an 8700k. And I record videos using my GPU which is a gtx1080.
Huh... no no no... I don't stream... that being said...
for Older Two Threaded games Pile driver can record just fine using software alone at a 25Mb/s Bitrate... however one time I forgot to switch OBS to hardware recording and it did have a small negative effect on some newer games... that being said... it wasn't immediately noticeable... took me a while to realise something was "Off".