I have the same motherboard as you and that was my chip! heres what I did to get it running:
1. On the main bios screen press Ctrl+F1 to open the advanced options within the menus
2. In the Advanced Bios Features Menu, Disable all of the following: CPU Enhanced Halt (C1E), CPU Thermal Monitor 2(TM2), CPU EIST Function
3. In the PC Health Status menu, set the FAN Speed Control Method to "Legacy" & FAN Speed Control Mode to "PWM" to maintain highest speed
4. Go into the MB Intelligent Tweaker (MIT) menu at the bottom of the page, set the System voltage control to "Manual"
5. These boards have a default VDIMM of 1.8v, set the VDIMM to co-ordinate with your ram. This will be +0.3v for ram rated 2.1v
6. Set the MCH Voltage to +0.1v
7. Set the FSB Voltage to +0.1v
8. Set the VCORE to 1.325v
9. Set the CPU Host Clock Control to "Enable"
10. Set the System Memory Multiplier to "2.00"
11. Set the multiplier to 6
12. set the cpu host frequency to 400
13. set the top four memory timings to 5-5-5-15
most of this was taken from this thread:
http://forums.overclockers.co.uk/showthread.php?t=17636047&highlight=gigabyte+ds3
Dan