We achieved our previous record for HyperTransport overclocking on an Athlon 64 mobo using the Asus A8R-MVP. That board reached 325MHz stable. Here's what I got from the A8R32-MVP.
The A8R32-MVP Deluxe was especially forgiving when I overshot, too, powering back up after a failed attempt and prompting me that an overclocking attempt had failed. I didn't have to clear the CMOS once in order to get it to POST.
I will gripe about one omission, though: the BIOS doesn't include enough control over maximum and minimum CPU multipliers when overclocking in concert with AMD's Cool'n'Quiet power management technology. The board does allow for multiplier adjustments when C'n'Q is enabled, but they don't seem to take effect; the system just POSTs with the CPU at its max multiplier instead.
We measured the power consumption of our entire test systems, except for the monitor, at the wall outlet using a Watts Up PRO watt meter. The test rigs were all equipped with OCZ PowerStream 520W power supply units. All of these motherboards' onboard peripherals were enabled in the BIOS and proper Windows drivers were installed for them. The idle results were measured at the Windows desktop, and we used the potent combination of Cinebench's rendering test and the "rthdribl" DirectX 9 graphics demo to put load on the systems.
The graphs below have results for "power management" and "no power management." By "power management," we mean AMD's Cool'n'Quiet CPU clock throttling mechanism that kicks in when the processor is largely idle.