Yoh guys,
I am the one with the C2D having the same problems. I am not able to run my system (prime or LinX) stable using a higher freq, than 1,200 Mhz memory speed.
So I tried to talk to the ASUS brick wall in this way:
I have some serious problems running my memory more than 1,200 MHz.
The board is running excellent with 9 X 450MHz, memory speed at 1199MHz and tRD 6. Every time I try to increase the speed and I run my Memory above DDR 1,200 Mhz, the board starts randomly failing. No matter what I do. No setting in the BIOS that I've got available can help me to stabilize the board.
For example:
I tried to run it at 9 X 465MHz, memory at DDR 1239MHz and tRD 6.
The memory is MemTest86+ V2.11 stable at DDR 1239MHz tRD 6 and my CPU is
stable at 4.185 GHz. I know that because I tested my CPU at that speed with a different strap and my memory running at DDR 1117MHz and tRD 7.
With the memory at DDR 1239MHz I can run Prime95 Blend Mode but it will randomly fail. This can be in small FFT's or in Large FFT's. It can be stable for a few hours or it can fail in a few minutes.
I can run IntelBurnTest or Linx for a few passes stable before it randomly starts failing.
I tried DDR 1239MHz and tRD 7 with no Phase Pull-Ins enabled but I still can't get it 100% stable.
It's strange that I've got to delay DRAM CLK Skew on Channel B with 50ps while Channel A is on Normal with the Memory running at 1199MHz and tRD 6 to be able to run IntelBurnTest or Linx for a few passes stable.
I don't have to delay Channel B with 50ps when I'm using tRD7.
Many friends of mine are having these random stability
problems too when they are trying to run the memory faster than DDR 1200MHz and I am (or better we are) blaming the BIOS for those random failures. Because of the fact that the Intel X48 Chipset is designed to run at DDR 1600MHz.
Is there a memory limitation on this board of 1200MHz or is that just coincidence?
I find this very strange because in the QVL I can find X 1 Giga Corsair 1250MHz 5-5-5-15 that seems to be compatible with the ASUS Rampage Formula.
ASUS replied and feeds me some sweet talking bulls***:
"Thank you for contacting ASUS Customer Service.
My name is Lyn and it's my pleasure to help you with your problem.
We cannot assure you can run the RAMs over its rated frequency(1200MHz).
There is no such limitation for the memory frequency on this motherboard. But to overclock, you need to try it yourself.
In fact, even DDR2 1200 is O.C. speed. The motherboard supports 4 x DIMM, Max. 8 GB, DDR2 1200*/1066/800/667 ECC,Non-ECC,Un-buffered Memory.
Welcome to refer Troubleshooting & FAQ for ASUS products in ASUS website:
http://support.asus.com/troubleshoot...Language=en-us
http://support.asus.com/faq/faq.aspx?SLanguage=en-us
If having any problems, please don't hesitate to let me know. Let's discuss this
issue together.
Thank you for using ASUS products and enjoying ASUS services!
Lyn"
I will reply in a harder way. But what do you guys think about that? Isn´t it a shame to react like that?
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