I am curious as to what kind of performance you would get with the R9 70 or 265 in xifre while that chip is clocked @ 4.7 (both the APU + GPU OC'd ofcourse)
I'm eventually going to get a 290x but atm I'm just seeing what I can get out of this. even @ stock I'm getting 80-100fps in LOL on medium so its not really THAT big of a deal.
I don't play many graphically intensive games anyway and I don't mind turning them down a little to make them run well
Regarding the Whole business about the cores downclocking themselves when you are using the iGPU, there is a fix for that - You simply use AmdMsrTweaker v. 1.1 and set the P5 state to whatever you like (Your primarely overclock) - That way you are tricking the APU into "Downclocking" into an overclocked state - It Works, I tested it and can confirm it personally.
Make sure your NB frequency is as high as it will allow you too - Easy way to do this is simply to Work your way up - Start from 2000 then 2100, 2200, 2300, 2400 etc. at some point it will not let you boot at which point you just enter BIOS Again and take the NB frequency that is just below the one that crashed - This one should boot and enter Windows just fine - Do a few GPU benchies and a game or two - Should be bulletproof. I am running a NB Vcore at 1.20.
You have alot of room on your iGPU - Aim for a 1000Mhz at least and Work your way up there.
As for the CPU - Set your Vcore to whatever your cooler can handle - 1.4 Seems to be what most people use and just start adding a multiplier - Boot - Enter Windows - Run 20 minutes of Prime and a 3D benchmark, if this holds just go back to the BIOS and add another multiplier and keep doing that till it crashes - Then back Down one notch and enjoy your OC Kaveri