My computer won't boot up with 2 monitors connected

Sure here are the specs:

PC:
Motherboard: Asus Strix ROG 270-E
PSU: Thermaltake 850 watt RGB Gold standard
GPU: Asus Strix ROG GTX 1070ti
M.2 memory: Samsung 250 GB 960 EVO
CPU: I7 7700K

Monitors:
Connected via DP to DP: Asus pg248qe
Connected via HDMI to HDMI: Asus vs247h

That doesn't tell me if the BIOS is current. That CPU error on power up could be telling you there is a need to udpate the CPU microcode. https://www.asus.com/us/Motherboards/ROG-STRIX-Z270E-GAMING/HelpDesk_CPU/ lists a BIOS from early this year. Is that installed?

After that and still not working tell more story. As in it has never worked with two displays and then more detail with a Web Speccy report. How?
Read https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web

I just updated the Bios. I thought I had already done that previously but I guess I didn't. The computer now starts up properly, I tested it 3 times. A new issue did arise and its when the computer starts up and I try to get into the Bios menu, the bios menu is very very unstable. Its glitchy and slow to the point where I just have to save and exit. Any suggestions on that one?

And to answer your second question if I had 2 monitors plugged in on boot up there was a 50% chance I would boot up correctly, sometimes it would boot up and sometimes there wouldn't be anything on the screen.

Thank you for the help.

1. Is that something that I need to fix in the bios? I thought the MOBO is supposed to run that automatically, should I manually fix that?

2. I'm not finding any driver packages on Asus website for this mother board, I have 2x8gb Trident g skill RGB DDR4 3000 mhz ram. Should I go to their website and download their drivers for this ram?

3. Thank you, I'm assuming I do this through the bios. I will try going to the bios and enabling. Will that help with recognition of the RAM?

4. I'm sorry i'm not too familiar with HD stuff, is there anything I can do to fix it?

5. Thank you I updated those drivers.

Quick questions.

When updating drivers can I just run the application package and it will automatically unistall the current driver and install the new driver? Or do I have to uninstall the driver manually through device manager and then install the new driver?

Going through device manager and selecting "update automatically through the web" for device drivers doesn't mean that it is updated with the lastest driver? So I have to manually go to the websites to get the most updated driver?

Thank you again, all this info is very helpful.

There are thousands of posts about Vcore. This adjustment varies with the board which I didn't go get a manual for. Between the BIOS issue and this, it sounds like this area may be why you get a hang on boot. Since there are thousands of posts about Vcore, I don't get into it here since I would be duplicating the web. So I stick to simple. Just nudge the Vcore up a notch. If you want more about it, read more discussions about it.

As to automatic, sure, but once in a while you find a machine that you have to nudge it up to get stable operation. To me this beats replacing the motherboard and/or CPU.

2. Can't know unless you try it. Same for 3.

4. No, you can't fix drives that fail like this. You remove them from service if the owner is complaining about the usual effects.

Regarding uninstalling drivers. I rarely do that. For GPUs I might use DDU if something odd is happening but as a rule, just install the newest.

"Going through device manager and selecting "update automatically through the web" for device drivers doesn't mean that it is updated with the lastest driver? So I have to manually go to the websites to get the most updated driver?"

That's relying on Microsoft getting it right. Sorry but it's been decades and still not always right. Here's an article about this area: https://www.howtogeek.com/233115/the-only-way-to-safely-update-your-hardware-drivers-on-windows/

I went ahead and changed the Core volt to what was recommended (1.25) and now I’m running into the same problem with even one monitor. It take 5 or 6 boot ups for it to boot up in safe mode and then I can get into the bios. I see I have the option to change the boot voltages such as CPU core/cache voltage, Dmi boot voltage, cpu system agent boot voltage, and a couple others. Should I change any of those?

But your choice. I can only share how I tackle such issues but I can't guess why you went to that value. You must have some reason.

As to the other voltages that would be a discussion held on this motherboards own support forum. To me it sounds like some motherboard or RAM issue. I have had great luck with nudging up the Vcore a little but past that and I'm swapping out the motherboard if the maker can't get it to work right.

Yes when I pulled up the bios it said the Vcore was at 1.1V and I think the reason why it was below 1.0V when you saw it was because it had an idle of .996V or something close to that. Could that be the case of why the voltage was so low with the speccy?

Go get CPUz from https://www.cpuid.com/softwares/cpu-z.html and see what it reports.

It shows it as well. May be fine.


Basically you need to go with the setting that works best. After this I have to send you to the motherboard maker forum. Usually it's another setting to clear this up or change boards. Since there are so many boards out there I can't keep track of all the settings.

At our office we RMA boards that are unstable with stock BIOS settings. We don't want a long term support headache.
"Say John, do you remember how we fixed that machine with the hang on boot issue using the Krimean motherboards?"

I have been using CPU Z to monitor voltages and they can fluctuate greatly depending on whether I'm stress testing or idling. Do you want me to send a screenshot of my CPU Z stats?

I didn't get an alert and didn't see the thread marked as updated.

So for this one I'd get back to the board maker to find out what settings you should try.

I think we made minor progress but at this point you want to find this maker's support forum.

Set that back to what it was or default so the machine becomes stable with one monitor.

Yes vcore does bounce all over the place it has to do with power saving.

Your hdd is junk so get that out of the mix.

Post another speccy.

Hi, thank you for the suggestion. I’m going to give everyone a brief update.

I contacted ASUS support and they helped me diagnose the problem. The VGA error LED on my motherboard has been lighting up when my mobo does a POST test and this is the cause of the problem. (I also have troubles waking the PC up from “sleep” mode in windows) I tried multiple graphics cards in different slots on the mobo and the problem persisted so they told me its a faulty mobo.

Unfortunately, they said I have to send in the motherboard for repair which will take about a month. So I think I’m going to go forward and do this option.

Thank you for all the help!

I think I had written it's time for the maker to tell about possible settings but I missed there was some VGA error LED until this post. That tidbit may have lead me another direction but you did the right move and away it goes.

I'm back again. I sent off my motherboard to be fixed by the manufacturer and they returned it saying they couldn't reproduce the problem so nothing was fixed. Bummer.

Like I previously stated in the update it is now the VGA LED error on the motherboard when it doesn't boot up correctly with 2 monitors (also when waking up from sleep mode). I have tried 2 different graphics cards and its still having the same problem. Any other suggestions?

Do you think this problem can be due from a defective power supply?