Table of Contents:
ASUS uses the American Megatrends AMIBIOS modified slightly for their own purposes. The main screen is split into Main, Ai Tweaker where the tweaking of the motherboard is done, Advanced, Power, Boot, Tools and Exit submenus. The main menu has the Time, Date, Language, detected SATA devices, Storage Configuration and System Information. The Storage Configuration screen is where the RAID is set.
The Ai Tweaker menu is where you will spend most of your time when overclocking the system. The menu is split into Ai Overclock Tuner, the Ratio CMOS setting and enabling the various features of the CPU including SpeedStep and Turbo Mode. I’ve broken down the performance tuning you can do into the following chart. I was able to overclock the Core i5-661 to 4.01GHz which is great, but workstation boards care more for stability than pure overclocking:
|
Setting |
Range |
|
Ai Overclock Tuner |
Manual, Auto, DOCP, XMP |
|
DOCP |
DDR3-1600, DDR3-1800, DDR3-1866 |
|
eXtreme Memory Profile |
High Performance, High Frequency |
|
BCLK Frequency |
80-500 |
|
PCIE Frequency |
100-200 |
|
DRAM Frequency |
DDR3-800, DDR3-1066, DDR3-1333 DDR3-1600 |
|
QPI Frequency |
4270,4800 |
|
OC Tuner limit value |
Good Performance, better Performance |
|
DRAM CAS Latency |
3, 4-10,11 DRAM Clock |
|
RAS to CAS Delay |
3,4-9,10 DRAM Clock |
|
RAS PRE Time |
3,4-9,10 DRAM Clock |
|
RAS ACT Time |
3,4-32,31 DRAM Clock |
|
RAS to RAS Delay |
1-7 DRAM Clock |
|
Ref Cycle Time |
[30DRAM Clock] [36 DRAM Clock][48 DRAM Clock] [60 DRAM Clock] [72 DRAM Clock] [82 DRAM Clock] [88 DRAM Clock] [90 DRAM Clock] [100 DRAM Clock] [110 DRAM Clock) |
|
Write Recovery Time |
1-15 DRAM Clock |
|
READ to PRE time |
1-15 DRAM Clock |
|
FOUR ACT WIN Time |
1-63 DRAM Clock |
|
Timing mode |
1N,2N,3N |
|
Round Trip Latency on CHA/B |
Advance 15-Advance 1 Clock Delay 1 Clock-Delay 15 Clock |
|
WRITE to READ Delay (DD) |
1-8 DRAM Clock |
|
WRITE to READ Delay (DR) |
1-8 DRAM Clock |
|
WRITE to READ Delay (SR) |
10 DRAM Clock-22 DRAM Clock |
|
READ to WRITE Delay (DD) |
2-14 DRAM Clock |
|
READ to WRITE Delay (DR) |
2-14 DRAM Clock |
|
READ to WRITE Delay (SR) |
2-14 DRAM Clock |
|
READ to READ delay (DD) |
2-9 DRAM Clock |
|
READ to READ delay (DR) |
2-9 DRAM Clock |
|
READ to READ delay (SR) |
2-9 DRAM Clock |
|
WRITE to WRITE Delay |
2-9 DRAM Clock |
|
WRITE to WRITE Delay |
2-9 DRAM Clock |
|
WRITE to WRITE Delay |
4, 6 DRAM Clock |
|
CPU Differential Amplitude |
700, 800, 900, 1000mV |
|
CPU Clock Skew |
100-1500ps |
|
CPU Voltage Mode |
0.85-2.10v with a 0.00625V interval |
|
IMC Voltage |
1.1v- 1.9v with a 0.00625v interval |
|
DRAM Voltage |
1.5v-2.5v with a 0.0125v interval |
|
CPU PLL Voltage |
1.8v-2.1v with a 0.1v interval |
|
PCH Voltage |
1.05v-1.15v 0.10v |
|
DRAM DATA REF Voltage on CHA/B |
0.395x-0.630x with a 0.005x interval |
|
DRAM CTRL REF Voltage on CHA/B |
0.395x-0.630x with a 0.005x interval |
