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Extreme 7+ power up/restart deadlocks |
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Marwyn 
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Joined: 17 Jul 2016 Status: Offline Points: 5 |
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 Topic: Extreme 7+ power up/restart deadlocksPosted: 17 Jul 2016 at 2:27am |
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Here is my configuration:
Extreme 7+ (uefi v3.0), i7 6700K, 64GB RAM, 2x Samsung NVMe SSD in Raid 0, W10 Pro, 2x Ezio Flexscan L568 DVI, 1x Eizo Flexscan EV2736W Display port, no overclocking. Problem description: If I utilize all three display outputs on iGPU ports, that is display port, hdmi and dvi, then I have about 80% chance that power up/restart will fail immediately with random error code, but in most cases it is 00. In such case I have to power off with switch on PSU, wait few seconds and then try again. Also random combination of 2 monitors becomes active, sometimes it is display port+hdmi, sometimes hdmi+dvi. If I am lucky and it passes uefi boot then everything is perfectly stable and all three monitors work in the OS. This issue disappears if I use just one output, say display port. Using PCIe graphics (even with all 3 monitors) also eliminates this problem. I am not going to use iGPU with 3 monitors, so it is not a big issue for me, however I am curious if anyone has an idea what could be wrong? |
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clubfoot
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Joined: 28 Mar 2016 Location: Canada Status: Offline Points: 246 |
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Posted: 17 Jul 2016 at 10:14am |
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Did you make any changes in the BIOS for igpu or dedicated graphics?
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parsec
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Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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Posted: 17 Jul 2016 at 11:38am |
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I'm sure I've never tried three monitors on the Intel integrated graphics. I'll need to try that... since I actually can. Will take a little bit of work. You should be able to use three monitors with the Intel graphics. Given your system specs, I imagine you have the Intel graphics driver installed. Not that it should make a difference, but what version are you using? The 00 post code is a CPU failure, but that is not really the cause... I hope. Of course if you had a defective CPU, Intel will replace it under warranty. A few thoughts, since you said you do not OC, are you using default UEFI options for the CPU, which includes the iGPU option settings? If so, the Shared Memory option for the iGPU would be on Auto, or the maximum. I wonder if there is a memory shortage issue. The Ezio Flexscan L568 monitor, if I found the right one, is an older, high quality monitor, running at 1280 x 1024. The specs I found for the L568 show a VGA and DVI input, so are you using a DVI to HDMI adapter on one of them? The Eizo Flexscan EV2736W is a newer model running at 2560 x 1440. The stock, default voltage setting for the Intel iGPU may not be enough to deal with your three monitors. Or possibly the (??) HDMI to DVI adapter is causing trouble. Any chance your cables are getting old, or super long? You could try setting the iGPU voltage mode to Adaptive, and leave the iGPU voltage and offset to Auto, which should increase the voltage to the iGPU. That should not cause much if any additional heat for the CPU, since the Intel iGPUs are very power efficient. You said using one monitor on the iGPU is never a problem. What about two? I'm not sure I understand your description of what combination of monitors works and does not work. You must be using an after market CPU cooler, so that should not be a problem. No mention of your PSU, so you must feel it is not involved, which I would tend to agree with. |
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parsec
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Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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Posted: 17 Jul 2016 at 1:34pm |
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So I have three monitors running off the Intel Graphics. But it wasn't completely plug and play.
 Monitor 3, identified as Digital Television VS24A, is actually an Asus VS24AH-P 1920 x 1200 monitor, that Asus has never provided a driver or INF file for, so is identified as Digital Television.  The other two monitors are 1920 x 1080 Dells. The P2714H is on DisplayPort, the U2312HM is on DVI, and the VS24AH-P is on HDMI. I booted the PC with default iGPU voltage settings in the UEFI (3.00.) It booted fine the first time, and all three monitors were on. At the Windows desktop, I was seeing some artifacts on the Dell 2312 (DVI), a few very thin horizontal lines that would appear and disappear, but the display was 98% normal. That died down as a minute passed. Artifacts at the desktop is not good, gaming with triple monitors... I won't continue.  I decided to run an Intel Extreme Tuning Utility (IXTU) Graphics stress test. I also wanted to use IXTU so I could monitor the Intel graphics voltage, and if necessary, increase it. That is easily done in IXTU, and if you've never used IXTU, IMO it is the best program for over clocking in the Windows environment. I should mention I had SpeedStep and C States enabled, which no doubt affect the results I get. I ran the Graphics stress test with default UEFI iGPU settings. Immediately I saw the artifacts again, and there were more of them. I quit that test at that point. Three monitors with default UEFI settings is barely usable with my monitors. All monitors are not the same, and apparently even with all digital video signals, some monitors need a stronger signal, IF that is what the problem is. I was seeing 1.1V for the iGPU in the first Graphics test, in IXTU, the default setting. That is really the graphics VID, the iGPU voltage in HWiNFO64 was the same, as was the iGPU VID. I increased the iGPU voltage via the iGPU Offset, to 1.25V in IXTU. Ran the IXTU stress test again, and I had a few artifacts, but they were much less than the first test. I then over clocked the iGPU from the default 1,150MHz, to 1,250MHz, and increased the iGPU voltage to 1.325V via the iGPU Offset voltage. Ran the Graphics stress test again, the artifacts were gone, and the test passed. I never saw any artifacts on the other monitors. This quick and simple OC and voltage fix was only to see if I could get the artifacts to disappear. We can't OC the iGPU beyond 1,350MHz usually. I only went to 1,250MHz. So it looks like triple monitors on the Skylake 530 graphics is not a given, at least without some tweaks to the iGPU. It also seems the monitors being used makes a difference, and that the DVI connection might be the weak link of the three video outputs available. I did not use any adapters for the video inputs, I used all direct cable connections of the three types. |
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Marwyn
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Joined: 17 Jul 2016 Status: Offline Points: 5 |
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Posted: 17 Jul 2016 at 3:11pm |
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No. I made only changes necessary to setup Raid 0.
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Marwyn
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Posted: 17 Jul 2016 at 3:50pm |
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I don't remember what version it was, drivers were installed by W10, so it should be some recent version. But again, I had absolutely no issues once it booted to the system.
I tested the CPU several times with Intel validation utility. In another motherboard this CPU passed several days of stress testing. I also tested memory with memtest - 4 days and nights without error, so I am pretty sure these two parts are fine.
Yes, defaults.
I think default is Auto.
Yes, one of them is connect with HDMI->DVI cable.
Correct.
I don't think HDMI->DVI is an adapter. It should be just digital cable with different connectors on ends. All three cables I use are 2m long so the length should not be an issue.
2 monitors (Display port + HDMI) were also ok. Problems started when I connected DVI. On power up random combination of 2 monitors detected signal and the third went to sleep mode, if it passed uefi and booted to the OS then all of them were working ok. So the PC sometimes started with signal on DVI+HDMI, in other cases it was Display port+HDMI.
Cooler is Noctua NH-U12P SE2. The PSU is Seasonic X Series 750W. |
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Marwyn wrote: