ASUS P9X79 / F3-12800CL9-4GBZL - system instabilities

[ineedagun]

Dear users,

i have the following hardware:

ASUS P9X79 (latest bios: 1103)
G.Skill F3-12800CL9-4GBZL (4x4GB)
Intel i7 3820
ZOTAC nVidia Geforce GTX 470 (latest driver: 301.42)
OS: Windows 7 64bit


The system is running like this for over 2 months now, sometimes it crashed, but it was not very often and i didn't have the time to fix it.
Since saturday i have to take this time, because sometimes i'm not even able to start windows.
So from saturday on i occupied oneself with bios settings and read a few threads in this forums.
Right now, the RAM seems stable (tested last night with MemTest86: 6 pass, 0 errors).
I think i have the latest version, since i downloaded it a few days ago.

The settings i made can be seen in the images.
The "important" changes i made, are
- VCCSA (which is by default at about 0.88V and seemed quite low in comparison to other settings in this forum)
- timings (not Auto, and REF cycle time/tRFC to 255)
- PCIe to Gen2 instead of Gen3

The problem is that the system is not stable. Right now it is running for over an hour, but before it froze just at the login screen.
Other symptoms are:
- Freezes even in bios, during startup and just at any time in windows.
- "the display driver has stopped working and has recovered" - when this happens, the pc continues working and does not freeze (just once, both happened).
- Sometimes the graphic card-LED on the mainboard (a ASUS feature) flashes after the freeze - but not every time!
- After a freeze i have to reset the computer and most of the times, it won't start again (the display stays black, but it gets a signal!). In this case i have to unplug the power and then start again.


In my humble opinion the RAM should be okay (because the MemTest86 didn't generate any errors). So it could be the mainboard, the graphic card or even the cpu.
In 2 days i got the chance to test another graphic card, but till then i would be glad to hear some advice, which i could do.
And furthermore: do the MemTest results really say, that the RAM is okay. Or could possibly the RAM be responsible for that?

Thanks for advice.









not included: CPU Power Management
CPU Ratio: Auto
Enhanced Intel Speed Step Technology: Enabled
Turbo Mode: Enabled
CPU C1E: Auto
CPU C3 Report: Auto
CPU C6 Report: Auto
CPU C7 Report: Auto

EDIT: I'm just trying to run this system the normal settings - NO OC.

[Tradesman]

What actual set(s) do you have? What you show up top (F3-12800CL9-4GBZL) would be a single 4GB stick, do you have 1 set of 4 sticks or 2 sets of 2 sticks? If you have more than 1 set/package of DRAM then XMP won't work correctly and all needs to be input manually, and may well require additional DRAM and/or VTTCPU (Memory controller) voltage

[GSKILL TECH]

Have you tried testing one module at a time to make sure a module is not defective?

Thank you
GSKILL TECH

[ineedagun]

What actual set(s) do you have? What you show up top (F3-12800CL9-4GBZL) would be a single 4GB stick, do you have 1 set of 4 sticks or 2 sets of 2 sticks? If you have more than 1 set/package of DRAM then XMP won't work correctly and all needs to be input manually, and may well require additional DRAM and/or VTTCPU (Memory controller) voltage

sorry, just copy pasted the abstract from the AI suite.
I have the following set: [ RipjawsZ ] F3-12800CL9Q-16GBZL (4Gx4)

Have you tried testing one module at a time to make sure a module is not defective?

Thank you
GSKILL TECH

With these settings: no.
But MemTest86 passed with this kit. So, is it necessary to test just one module at a time, running windows / prime95?
Thx so far.

[Tradesman]

Might check each stick, just to be sure they are good, then might try raising CPUVTT a bit (.05) maybe, what does XMP load for tRFC, you show 255, which seems high, I run a 32 GB set at 256-278

[ineedagun]

Hey,

sorry for the late answer. The new graphics board is installed since a few days and everything works fine.
I also set the tRFC back to Auto (i think it will switch value back to 124 or something like that) und Memtest86 still looks fine.

Thanks for the help. This issus should be solved.

[Tradesman]

Glad to hear it, keep in touch