That's from the review:
Asus A8R32-MVP Deluxe
CPU Interface: Socket 939 Athlon 64
Chipset: ATI RD580 Northbridge - ULi M1575 Southbridge
Bus Speeds: 200 to 400MHz in 1MHz Increments
Memory Speeds: DDR200,266,333,366,400 (433,466,500 with Rev. E AMD)
PCIe Speeds: 100 to 150MHz in 1MHz Increments
PCI/AGP: Fixed at 33/66
Core Voltage: Auto, 0.8V to 1.4V-1.55V* in 0.025V increments
PLUS 0.1V & 0.2V with vCore Over-Voltage
(Maximum vCore 1.6V to 1.75V)
*Max Voltage depends on CPU ID. To 1.55V with Clawhammer
CPU Clock Multiplier: 4x-25.5x in 0.5X increments
DRAM Voltage: Auto, 2.6V to 3.2V in .05V increments
HyperTransport Frequency: 1000MHz (1GHz)
(Stable in overclocking to 1500+ HT)
HyperTransport Multiplier: Auto, 1X to 5X
Northbridge Over-Voltage: Auto, Disabled, Enabled
Enabled adds 3 New Voltage Options Below
Core Voltage: 1.2V, 1.3V, 1.4V, 1.5V
HyperTransport Bus Voltage: 1.2V, 1.3V, 1.4V, 1.5V
PCI Express Voltage: 1.2V, 1.3V, 1.4V, 1.5V
Southbridge Overvoltage: Auto, Disabled, Enabled (+0.1V)
PEG Link Mode: Auto, Disabled, Normal, Fast, Faster
PEG ah heck Length: Auto, Short, Long, Longer, Longest
AI Overclocking: Manual, Auto*, Standard*, Overclock Profile**, AI N.O.S.**
*CPU Frequency and Other OC Parameters Set Automatically
**Manually Set CPU Frequency and Other Parameters Auto Adjust
Overclock Profile Options: OC 3%, 5%, 10%, 15%,20%,30%
AI N.O.S. Options: OC 3%, 5%, 7%, 10%, 15%, 20%
Memory Slots: Four 184-pin DDR DIMM Slots
Dual-Channel Configuration
Regular Unbuffered or ECC Memory to 4GB Total
Expansion Slots: 2 PCIe x16
1 PCIe x1
3 PCI Slots
Onboard SATA/RAID: 4 SATA2 Drives by ULi M1575
(RAID 0,1,1+0,5,JBOD)
PLUS 2 SATA2 Drives by Silicon Image 3132 (RAID 0,1)
Onboard IDE/IDE RAID: Two Standard ATA133/100/66 (4 drives)
Onboard USB 2.0/IEEE-1394: 8 USB 2.0 ports supported by ULi M1575
2 Firewire by TI 1394a
Onboard LAN: PCIe Gigabit by Marvel Yukon 88E8053
PCI Gigabit by Marvel 88E8001
Onboard Audio: Azalia HD Audio by Realtech ALC882 codec
BIOS Revision AMI 307 (2/15/06)
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The vCore Over-Voltage is max at 1.75v that's not enough. It depends on the CPU that means it could be lower!