CMX4GX3M2A1600C9 on P7P55D PRO won't run at rated speed - Page 2

martijnverduin · #16 10-30-2009, 02:00 PM

Quick result: running XMP profile and adjusting the QPI (or IMC) from 1.15V to 1.35V seems to produce stable result. On 1.25V it's still not working correctly, Prime95 detects error after 2 mins. On 1.35V Prime95's been running for 5 hours without errors...

Let's hope it'll keep up!

RAM GUY · #17 11-03-2009, 06:26 PM

NP and I would talk to the MB maker and see if they have an updated BIOS that might help this.

martijnverduin · #18 11-04-2009, 02:53 AM

Freeze occurred after running Prime for hours on end, when I finally thought I had a stable system...

So I'm going to try at 1.40 in a while, can't really have my system dying on me right now so I'm running 1333MHz for the time being...

@RamGuy: do you suggest me bugging Asus about this? You know they don't respond well to Ram-related questions "Is it on the Vendor list? No? Then don't bother us..."

Bobby Bec · #19 11-05-2009, 06:07 PM

Hello everyone :)
i have almost the same problem
Asus P7P55D Pro with Corsair CMD4GX3M2A1600C8
My pc is stable at 1333MHz but if I put on the XMP 1600MHz i can't play any games because of blue screens freezes etc .I ran memtest with XMP Enabled and so far no errors
I tested it with one module at a time with XMP Enabled and again blue screens freezes ..
Is my ram not working properly ?

apology for my bad English :)

RAM GUY · #20 11-06-2009, 01:13 AM

I would try setting the IMC Voltage to 1.4-1.45 Volts with XMP Enabled and see if its more stable.

Bobby Bec · #21 11-06-2009, 09:57 AM

I tested it with IMC Voltage to 1.4 and 1.45v with XMP enabled but nothing changed :(
I'm still getting blue screens freezes.
Any suggestions ?

RAM GUY · #22 11-06-2009, 07:56 PM

Did you try the modules one at a time and see if you can isolate one of the modules causing that?

Bobby Bec · #23 11-06-2009, 09:12 PM

I did try with one module at a time with XMP enabled and my pc was unstable just as much as 2
I ques i can try with one module at a time with IMC Voltage to 1.4 and 1.45v and see how it goes ?

leaf · #24 11-14-2009, 10:44 AM

I am having the exact same problem. CMX4GX3M2A1600C runs stable at 1333 with P7P55D Pro, but as soon as I enable the XMP, it can't even load the Windows. Sometimes it can't even get into the bios.

Any suggestions what to try? Thanks.

Bobby Bec · #25 11-14-2009, 02:55 PM

There is new bios from Asus 0915 which seems to almost fix the problem.
My pc is stable in games with XMP enable now but not so stable in Windows