Simple question, anyone know what post code 11 means on a 790i Ultra? All docs I can find just say "Reserved".
 
Here's the situation - PC seems 100% stable. Memtest each stick in the black slots both separate and together, Prime 95, 20 passes of IBT on max. I fold on an SMP client and 3 GPU clients pretty much 24x7 and never fail any WU's or get an UNSTABLE_MACHINE error. Temps for the CPU stay in the mid 50s on all cores under 100% load (pushing just over 60 with IBT max stress), and the hottest part of the board is the MCP at roughly 68 (need to get a fan on it, but it's not grossly high or anything). Gaming is perfectly fine, never blue screen, never crash an app, and so on. You get the idea. But about 1 in every 3 reboots sticks on post code 11. Never paid much attention to it since everything else seemed 100% stable, but it does get annoying having to reboot twice every once in a while.
 
I figure I'm undervolting something, or have something screwed up in the bios, but without knowing what post code 11 actually means, I feel like I'm taking shots in the dark to try to fix it. I've tried tinkering with just about everything that would be a "usual" suspect to no avail - vcore, FSB voltage, mem timings, MCP/SPP voltage, and so on. The only other thing I can think of is that I'm on P07 still, being a big fan of "if it ain't broke, don't fix it". Any ideas?
 
Has anyone ever hit this post code, and what did you do to resolve it?

I had found an old thread from you actually that you stated that you thought it was mem related. Guess I should have hunted the archives a bit more. Anyway, mine has been doing this for over a year, and as I mentioned, is really more just an annoyance at this point. If you dig anything else up on it, by all means let me know. I'd rather not have to go through the RMA on a motherboard that's no longer in production. No telling what I'd get in return, lol...
 
Maybe getting time to put those EVGA bucks to use. Thanks for the fast response VH!
 
EDIT: I'll try to post a template in a little bit, just to see if there's anything that sticks out.

Template below. Other notes, my RAM is the 1.7V variety in my sig (not undervolting it), and I know what the XD bit is used for. I like that one being set. Otherwise, what's in the sig is in the box, with the addition of another vid card. I also ran IBT again today just to see, and went 20 passes with no errors again. Took a screenshot if you want me to toss that up here as well.
 
BIOS Version: P07
**System **
CPU Freq, MHz: 3400
FSB Reference Clock, MHz: 1600
CPU Multiplier: [8X]  (8.5 actual with N/2 multi)
PCle x16-1 & 16-2, MHz:  [Auto]  100
PCle x16-3, MHz:  [Auto]  100
SPPc->MCP Ref Clock, MHz:  [Auto]  200
nForce SPP --> nForce MCP:   [5X]
nForce SPP c-- nForce MCP:   [5X]

**Spread Spectrum**
CPU Spread Spectrum: [Disabled]
HT Spread Spectrum: [Disabled]
PCle Spread Spectrurn(SPP): [Disabled]
PCle Spread Spectrurn(MCP): [Disabled]
SATA Spread Spectrum: [Disabled]

**FSB & Memorv Config**
FSB - Memory Clock Mode: [Linked]
FSB - Memory Ratio: [Sync Mode]
FSB (QDR), MHz: [1600]
Actual FSB (QDR), MHz: 1600
x MEM (DDR),  MHz: Linked  1600
Actual MEM (DDR), MHz: 1600
P1: [Enabled]
P2: [Enabled]

**Memory Timing Setting**
Memory Timing Setting: [Expert]
tCL (CAS Latency): 8
tRCD: 8
tRP: 8
tRAS: 22
Command Per Clock: [2T]

** Advanced Memory Settings **
tRRD: [Auto]  6
tRC: [Auto]  41
tWR: [Auto]  12
tWTR: [Auto]  18
tFAW: [Auto]  31
tREF: [Auto]  7.7
tRFC: [Auto]  88

**System Voltages**
CPU Core: [1.31875]  1.26V
CPU FSB: [1.30]  1.30V
Memory: [1.700]  1.70V
nForce SPP: [1.40]  1.40V
nForce MCP: [1.50]  1.50V
GTLVREF Lane 0: [Auto]  -50 mv
GTLVREF Lane 1: [Auto]  -50 mv
GTLVREF Lane 2: [Auto]  +00 mv
GTLVREF Lane 3: [Auto]  +00 mv

**CPU Configuration**
Limit CPUlD Maxval: [Disabled]
Intel Speedstep: [Disabled]
xPPM Mode: [Native]
CPU Thermal Control: [Disabled]
C1E Enhanced Halt State: [Disabled]
Execute Disable Bit: [Enabled]
Virtualization Technology: [Disabled]

CPU Core 0: [Enabled]
CPU Core 1: [Enabled]
CPU Core 2: [Enabled]
CPU Core 3: [Enabled]

and.......tREF: [Manual]  7.8uS

Any update on what you did to fix this? I am still troubleshooting and before I started messing with everything again I was having the same problem I was also getting some snags on post code 64 which is more rare, but also a reserved post code.

I konw that when I was overclocking I was getting the freeze on post 11 quite a bit, now that I am back down (no overclock on the cpu, underclock on the memory) I haven't had any trouble with freezing on post 11 or 64. This probably doesn't help you, but it seems like this would indicate that it is not a board problem. Maybe... but probably not?

Hello,
 
GRRRR, i hate this problem, i just wanted to commisserate with you
 
grr.
 
I own 790i ultra, q9550 , 8gb ram linked / synced to 1600mhz, etc  and I HATE post code 11.  it has HAUNTED ME since I built my rig,  YES, only happens once every 8-10 days or so, UNTIL it HITS YOU, then it happens every other reboot for an entire day it seems!  then it disappears for a week or two, I'll think i've FIXED it, and then aLL OF THE SUDDEN, I reboot and the infamous fans-keep-going-full-blast-plus-post-code-11  and I grumble, and ignore it and move on
 
BECAUSE I'M FULLY STABLE!  I CAN RUN FOR 24 HOURS IN PRIME 95, CAN RUN FOR 4 HOURS IN OCCT, i run Multi GPU fur-Mark until my 2x gtx275's hit 101 deg C,  and it never crashes,  ever!  fully stable.
 
BUT, every so few boots, I boot straight to 11, and goes nowhere.
 
Just so you know, EVGA already volunteered to RMA my board after trouble shooting with THEM, got my new board all was well, and then BAM, same thing!  it didn't fix it,  THEN i got INTEL to RMA the CHIP the q9550 after trouble shooting,  and BAM post code 11.  Grrr, i feel like I will never find the solution to this problem while I am running this current setup.
 
Out of curiosity, you aren't running an Epson printer, are you?  Or, are you running a generic on-board USB  Multi-CARD READER...?  thanks, good luck man,  i feel your struggle.  there's no light at the end of THIS tunnel it feels.  
 
Hey, i just updated to my first ever SSD, to boot on an SSD, I thought Maybe if I get off of these WD3200AAKS hard drives, maybe there is some "going green" function to save power or something and my HARD drives are instigating this code 11, and even still, after switching to booting off of an SSD, i still get code 11, maybe even MORE now.
 
BUT, when i drop down to STOCK voltages and times, etc, like if I go into bios and say "reset to defaults" and then run at unlinked, unsynced 1067 / 1333   then and only then, with NO increase in clocks, do I run stable for weeks on end with NO code 11
 
 

Ha, holy cow.  Well, I've wondered if my silly little multi-card reader has been causing it, and the only reason I wondered that is because one day when I was going through some post code eleven woes, I noticed the LED lights on my SD card reader were dim/flickering/dimly etc doing abnormal things.  And, I also only know what I've learned the past year as I've built this machine, and when you mention "stepping" of your CPU, well, I've HEARD of stepping, but I couldn't even begin to tell you how my stepping may or may not be influencing my post code eleven woes ;-)
 
Anyway,  here is what I'm running
 
Q9550 i once knew my stepping, but since RMA's and not on new packaging i don't thinnk, it says this though  "SLBV8" as one of the many data given
790i ultra sli
OCZ3x16004gk  8gb
2x WD3200AAKS western Digital 320 gb in RAID 0
     -raid from my mobo
LG lightscribe IDE dvd burner gh22Lp20
LG BD-ROM cheap-o, code 11 occured both before and after this installation
Sabrent CRW-UINB 68-in 1 card reader
Now, I am running as my boot drive an OCZ Vertex 2 ssd 60gb
2x BFG GTX 275
Corsair TX750W psu
Epson rx580
 
So, yeah what you say about the multiplier makes sense, I mean, that it is really a problem simply with the combination of 790i ultra WITH q9550 multiplier WITH anything else, etc, and maybe it's not.  
 
But thank you for trying and for responding, and for posting initially, I was so overjoyed when I read your post because I feel like nobody know's my pain. 
 
We know
 
We know the pain of code 11.  If you can think of any way I can help, please let me know!  

You, are the man, my friend.  I'm so grateful to you for posting.  Just even to know that this problem exists for others, etc.
 
 I've just been running at my stock speeds for about three days, and I'll let you know what I find, too.. I mean, I dont' expect i'lll have a single crash by the next time we talk.  
 
But yes, if through YOUR homework, you find that I can acheive stability at higher speeds simply with the n2 turned off, then cool.  
What is the n2 multiplier, do you know?  or do you have a handy way of explaining what a muliplier is?  i mean, so as hertz is a single instruction and so 2400 mhz means that my cpu can execute 2400 instuctions per second... so it's taking 400 mhz of front side bus energy and running it through a "multiplier" which is essentially a splitter or an inverter which takes that 400 mhz and turns it into 2400 mhz..?!
 
Ha!  that's the explanation of how the CPU works that you get from someone who doesn't know what they're talking about!  ignorance is dangerous!

Cool yeah thanks!  yeah I agreed, and was so excited, I totally did the same thing, I have disabled my n/2 multiplier and did my "regular" proven stable 24+hours and OCCT and burn test etc MEMTEST etc, stable with FURMARK running until 100+ deg C... N/2 disabled running at 1600mhz and for OVER TWO WEEKS not a hiccup and never a hang on boot, NO ERROR 11
 
and then it struck this morning.  And then BAM, again, and BAM again.   BAM BAM BAM,  three times within fifteen minutes.  It hangs, I SANK, i looked, it said 11, i sank even deeper. i reset it's in safe mode I enter bios and exit so it posts my bios settings of 1600 mhz again, and then BAM right again which usually never happenes.  and then i hit power right away.  and then waited, and it did it a third time when i powered on,  and then NOTHING
 
no problem since,  I'm running at 1600 now, I have booted fine all day.  I heard nothing for two + weeks,  then all of the sudden this morning for some reason, it won't even post and hangs on 11.
 
again, memtest has cleared all sticks of ram and individaul sticks of ram, i've had my CPU and my MOBO both RMA'd, this problem occured on my old mobo and old cpu and new mobo and new cpu
 
 
but, the bummer is, that the n/2 worked FOREVER< and i thought it solved it
 
but then Bam
 
BAM BAM
 

Well, perfect example of YMMV here. I dropped the multiplier to 8, increased FSB to 450 (3.6GHz OC, link/sync), and bumped the vcore up a single notch. Been running with it like this for roughly two weeks, and have yet to hit post code 11 again. Not a terribly thorough or exhaustive test, but it seems to have made an improvement on my system. Of course, I say that now, lol....