X48 Rampage Formula Preview.

[Alien Grey]

Here is my best stable and more important relatively low-voltage settings.


Ai Overclock Tuner [Manual]
CPU Ratio Setting [9.0]
FSB Strap to North Bridge [Auto]
FSB Frequency [460MHz]
PCIE Frequency [100MHz]

DRAM Frequency [1226MHz]
DRAM Command Rate [2N]
DRAM CLK Skew on Channel A [Auto]
DRAM CLK Skew on Channel B [Auto]
DRAM TimingControl [Manual(5-5-5-15)]
Refresh Period [16120T]
DRAM Static Read Control [Disabled]
Ai Clock Twister [Moderate]
Ai Transaction Booster [Manual]
Common Performance Level [06]
Pull-In of CH A/B all disabled

CPU Voltage [1.33750V] real 1.320V
CPU PLL Voltage [1.50V]
North Bridge Voltage [1.45V] real 1.445V
DRAM Voltage [2.10V]
FSB Termination Voltage [1.36V] real 1.264V
South Bridge Voltage [Auto]
SB 1.5V Voltage [Auto]
Loadline Calibration [Enable]
CPU GTL Voltage Reference [0.62X]
NB GTL Voltage Reference [0.67X]
DRAM Controller Voltage REF [Auto]
DRAM Channel A/B Voltage REF [Auto]

CPU Spread Spectrum [Disabled]
PCIE Spread Spectrum [Disabled]
CPU Clock Skew [Delay 200ps]
NB Clock Skew [Delay 100ps]


I tried with cpu300-nb200 skews and lower voltage and it was stable BUT i got very low L2 cache results. Ithought it was a voltage problem and thats why i tried with exactly the same volt-settings you see above but nothing, same low L2 cache results. I then changed back to my old good cpu200-nb100 skews and i got the results i was used to!
I also had problems with memtest while running my mem @ 2.00V but when i tried with 2.1V it went well. I have to say that one click up from 460 to 461 fsb and i cant find mem-stability!

So from now on these will be my new 24/7 settings.

Why do you use Ai Clock Twister Moderate when you can use Lighter with less NB Voltage and no difference in memory bandwidth?


I'm still trying to find 24/7 stability at 4.22GHz and DDR 1250MHz with tRD 6 and tREF 16120T. Maybe with longer timings I can always keep it stable so now I'm trying the default timings from the ASUS Rampage Extreme.

1st Information : 5 - 5 - 5 - 15 - 5 - 52 - 12 - 6
2nd Information : 8 - 6 - 6 - 4 - 7 - 4 - 7
3rd Information : 23 - 8 - 1 - 6 - 6

There's a little memory performance loss but that's nothing compared to what I could gain if I can have it 24/7 stable.