Horrible CPU Usage Issues/Throttling since 2.1

OK before all the people saying "update" ill tell you now that I have ALL the latest frameworks, drivers, patches and everything that could possibly be relevant to performance issues!!!

My spec (is getting old, planned upgrade to a FX-83 or 84 series in early 2014)
AMD Phenom XII 840 (piece of crap but chugging along still at 3.75ghz on air for 4 years now)
Radeon 7850 2gig OC Ed
Gigabyte AM3+ mobo
8gigs of Gskill Ram
SSD (swap)
WD blacks for storage/OS

CPU usage never got above 50% pre 2.1, now having MASSIVE issues with my CPU sitting at 100% on all Cores...

Just wondering what the *** they did to their code to have this happening now - also noticing my Radeon 7850 is hardly being used anymore while running the game - before it'd sit at 45% now its barely scraping 25%

And this is on a system that plays COD : Ghosts at 45fps on Med/High Settings (Tho thats more to do with DX11 and my GFX card)

bump - anyone know of any solutions on AMD based machines? have had some success setting the priority to above normal/high in tskmgr

Thank you thedevilcomes12 for your post outlining the trouble you are having with a possible system error,

In order for me to submit your report, I will need some more information. You can go Here and you can find templates for Windows and PS3 that represent the kind of details we need. Once you can provide such information we can move forward and resolve this issue. For now I am going to move this thread into Insufficient Information. You will not be able to reply, so once you have gathered the requested data please create a new bug report thread.

- Furlamseere