One of the top performing chipsets for AMD processors, such as the Phenom II, is the 790FX series.

Gigabyte also takes this board a step further, adding features such as Ultra Durable 3, Gigabyte SATA II, and more.
The design of the MA790FXT-UD5P makes one drool with the amount of detail and abilities that went into it.
(VERR_VMX_NO_VMX)." when i tried to start the guest os. I discovered the same thing, that is, Remove 3.1.0 - Same problem. Looking like a motherboard interaction, I guess, but it would be really useful to know what the change was from 3.0.12 to 3.1.0, so that if it's not a Virtual Bax issue, we can at least try to resolve it with Gigabyte. winds350: try to find a BIOS update if you are sure about that.
Configuration AMD Phenom II X4 955, Gigabyte GA-MA78GPM-DS2H motherboard, Host OS: Windows 7 Ultimate 64bit, Guest OS: any. XP compatibility mode in Windows 7 also uses AMD-V. The same problem should also show up when installing the XP compatibility mode extension for Windows 7.
Background The current Phenom II architecture is very unique, and is AMD’s answer to Intel’s Core2Duo and Core2Quad series.
Unlike the Core2Quad, which is essentially two Core2Duo’s bridged together, AMD’s Phenom II is a chip with four individual cores.
Some buggy BIOSes report that hardware virtualization is used.
It happens to work with v3.0.12 because to starts hardware virtualization without check, and it happens to work, because no other virtualization really uses it.
Equipped on the latest GIGABYTE AMD chipset-based solutions including the AMD 790GX, 790X, 780G and 770, GIGABYTE Ultra Durable 3 Classic motherboards feature double the amount of copper for the Power and Ground layers of the PCB.