Yesterday i struggled with the memory at 2400, no matter how much i relaxed the timings and upped the voltage it aloway got stuck during windows startup. That also happened with 2133 and BCLK's at around 102MHz. Now i found that the APU PCIe VDDA voltage has to be increased alot. It's stock settings are at 1.05V things started go get abit more stable at 1.2V and now at 1.3V it's finaly running prime95 for more that 10 minutes at 2210MHz 10-12-12-32-42. Had optimized timings and voltages at 2133MHz yesterday and it ran prime95 for 3 hrs at 9-11-10-28-38 at 1.6V. Really strange that it needs an 0.25V voltage increase on the APU PCIe VDDA to run stable at 80MHz faster speed.