Asus P9X79 Pro ram issues

Z

Zypho

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Aug 29, 2012
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Having some issues with my motherboard, RMA'd it and still getting same issue. Before I get into it, here are the specs I am running

Intel i7 3820
Asus P9X79 Pro
XFX HD 7950 OC Black ed
Corsair Vengeance 1600 16gb ( 4x4gb )
Corsair AX850 power supply
Intel 120gb 510 series SSD
Dell U2412m monitora
Windows 7 Pro 64bit

With the first board, I would install all 4 chips of ram in the specified DIM's the manual tells me ( blue dims on this board so 2 chips per side / 8 dims total on board ). Windows was only picking up 3 out of 4 chips, thinking this was odd I rebooted into BIOS and used the SPD tool. It told me a different DIM was "abnormal" each time I rebooted, booted system with each chip individually fine. RMA'd the board, new board same thing. New ram, same thing. Finally called asus tech support and their solution was to put all 4 chips on the same side. Windows now picks up all 16gb but I am not sure if this is a solution or not.. Thoughts?

Also, experiencing crashing when the computer goes to sleep/turns off display..System still seems to be running but no keyboard and mouse support... (no caps lock LED's will come on or anything). Solutions I have tried for this are disabling hard drive shut down on sleep but still getting the issue. With the first board I was getting crashing during game play but I have yet to experience with the new board. Any suggestions on any of this?
 
What's the part number of your Vengeance memory kit?

Usually loading the XMP profile helps gets these kits stable - some of them need a 2N Command Rate.

I would also updat eto the latest UEFI - use USB BIOS Flashback.

-Raja
 
Hey Raja,

So my part number is CMZ16GX3M4A1600C9

Also I should have pointed out that I have updated to the latest UEFI, sorry for not mentioning that. Also I am not very familiar with XMP profile could you shed some light on that for me, also would that explain why all 4 chips work on one side but not when I have 2 chips per side? I noticed when they are all on one side CPU-Z says they are running dual, but when its 2 chips per side CPU-Z said quad.
 
The XMP profile sets timings according to what the modules were qualified at. If the settings are too tight at board defaults, there can be issues with DIMMs not mapping (they fail POST tests). Setting the XMP profile should help alleviate that.

-Raja
 
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