AMD's trinity (any APU) is a aimed at very low budget and entry gaming. They have 2 lines of processors, the APU and "enthusiasts" as I like to call it. You will want to upgrade to a better CPU such as the 6300 or 8320/8350, along with a new CPU you will also need a compatible motherboard. The motherboard you have right now is an FM2 motherboard, FM2 is made specifically for APUs. AM3+ is for their enthusiasts.
To sum up, yes your processor is very weak, aimed for entry gamers. You should upgrade to a better CPU. Since you are considering the GTX 670 I would assume you have a lot of money at hand. I highly recommend upgrading to a new processor from AMD or Intel. Something like the 6300/8320/8350 from AMD or the 3570K from Intel.
If considering an upgrade from AMD's path I recommend a 8350 and a Gigabyte 990FXA-UD3. If considering Intel I would get the i5 3570K along with an ASrock Z77 Extreme4.
Your power supply is also a bit overkill. Remember a PSU is only MOST EFFICIENT at around the 40% to 50% load mark.