Thank you all for your help,

I think i may have found what the CPU issue was, when i installed the last patch the game went straight to DX11 so before starting i set it back to DX9 at the start game menu. I never knew there was another option that needed to be changed back in the in-game menu System > Advanced . I set it back to DX9 there also and CPU usage dropped by 30'ish %.

Thanks all for the help and advice.