If i were to get an after market heat sink and oc would that reduce lag? While playing games such as far cry 3, battlefield 4 beta, bf3, crysis 3, in the task manager my usage is usually at 90%, is that something to be concerned of? \
You are using a lot of CPU. You didn't say what your graphcs were in your post. It sounds like you could be bottlenecking your processor as it is. I would make sure you are running or running as little as possible in the background when gaming. There are some games that will rely more on the GPU and others the CPU. I think BF4 may be CPU intensive.
Seeing as how that CPU is an APU and has it's own Graphics. that 760 will definitely be held back. Better to have an FX CPU . I dare say a Phenom II x4 965 BE and above would do as well if not better than that CPU. The processor you have is a good processor, for what it was designed for, but it isn't for heavy gaming.
I was just looking at some stuff on that. That appears to be a pretty stout processor. To be honest, I need to get a little more up to speed on the AMD stuff as I use Intel for my builds. If you get a FREE copy of Far Cry 2 or 3 ( forgot which ), then it has to be pretty decent to run that.
From what I saw on Newegg, it appeared that they were pplaying Far Cry 3 using the integrated graphics on the a10 6700k. If that is the case, then the dedicated card could only make it better. That processor is 3.7 Ghz and with turbo, can go to 4.4 Ghz. Not bad.