AMD Llano APU + Radeon HD6570

Hi everyone,

first of all I'd like to apologize for my english, I'm Italian. So excuse me if there will be grammar errors or brief explanations. Feel free to ask whatever you want, I'll try to answer as best as I can.

This is my system:

CPU: AMD A8-3850 2.9Ghz Llano GPU HD6550D
Motherboard: AMD F1A75 (basis model)
Video Card: Sapphire Radeon HD6570 2Gb
Sound Card: ASUS HDAV 1.3
Hard Disk: SSD Crucial M4 64Gb
RAM: Corsair Classic XMS3 1600Mhz, 2x2Gb
Power Supply: Corsair Builder Series CX430 430W
OS: Windows 7 Professional

If I try to overclock in the BIOS I can manage to set the FSB to 106, but after that the system gets unstable. Someone told me that the problem resides in the motherboard (AMD F1A75 Llano), that doesn't have some kind of “fix” for the PCI-E, where the video card is installed (Radeon HD6570), so it goes unstable.
I can't use the APU alone (with the integrated GPU, HD6550) because the motherboard does NOT have any video output (it's the basis model, not -v or -m)...my mistake during the order, but now that I have it I don't want to change it (for some time). So I can't even try to OC the APU system alone and after that install the external GPU.

This ASUS BIOS (UEFI) doesn't have the option to change the PCI-E frequency (for the same reason as before, it's the basis model).

I tried to lower the APU Multiplier to, for example, 22x and try the APU Frequency to 107, but after 106 it doesn't even start Windows (blue screen, or something). Also, I raised various voltages but it doesn't change a thing.

Following are the BIOS screenshots:





















http://img847.imageshack.us/img847 [...] pia.th.png

http://img210.imageshack.us/img210 [...] pia.th.png

http://img215.imageshack.us/img215 [...] pia.th.png

http://img140.imageshack.us/img140 [...] pia.th.png

http://img4.imageshack.us/img4/602 [...] pia.th.png


Thank you for your kind help,

Tommaso