ASUS PG279Q BIOS Defaulting Issue – Z97 + 4790K

Update (11/16/2016): I just realized that I never posted a fix for this. We ended up having to get a high quality DisplayPort cable that had good grounding to get this issue resolved. We went with a 6ft Cable Matters cable from Amazon. Since then the issue has not presented itself.

Yesterday my little brother Doug  (aka TopHattWaffle) called me with a weird issue on the new system that I helped him tweak. We swapped out his older Core i7 3820K and its X79 motherboard with a new Z97 board (Gigabyte Gaming 7 Z97X) and a Core i7 4790K. The system was working perfectly and quick at my place with no issues. He brought it home and once he got all his monitors and other devices connected is when the issues started. Instead of going in depth of each step and different things we tried I am going to just put a bullet point list below.

Here is the issue: When the ASUS PG279Q is connected to the system through the main GTX 970 video card and the system is restarted (particularly on a cold boot) the BIOS hangs and reverts to defaults (peripheral settings, overclocking, preferences, etc).


  • This does NOT happen when the monitor is disconnected and others are connected.
  • This is reproducible on-demand 100% of the time.

System Specs:

  • NZXT H630 Case
  • Gigabyte Z97X Gaming 7 Motherboard
  • Intel Core i7 4790K
  • Dual Gigabyte Gaming G1 GTX 970
  • Corsair H115i Cooler
  • 32GB DDR3-2400 Corsair RAM (4x 8GB)
  • Samsung EVO 850 512GB SSD
  • 3x 1TB in RAID 5 (Intel RST)
  • SteelSeries Apex Keyboard
  • Logitech G700S Mouse


  • Asus PG279Q over DisplayPort
  • HP ZR2740W over Dual Link DVI
  • HP ZR2740W over DisplayPort

Troubleshooting Steps Attempted (None Worked/Changed the Outcome)

  • Removed all RAM but 1 stick
  • Tried another stick of known good RAM
  • Disconnected ALL drives from motherboard
  • Swapped Video card slots
  • Ran only 1 video card
  • Flashed Motherboard BIOS from F8 to F7 version
  • Flashed video card BIOS to stock GTX 970 version
  • Removed ALL USB devices including keyboard and mouse
  • Removed all USB devices excluding keyboard
  • Connected ASUS PG279Q to HDMI (no video at all)
  • Factory reset motherboard BIOS
  • Checked CMOS Battery voltage (it was OK)
  • Switched active motherboard BIOS to backup BIOS
  • Checked and re-seated all power cables
  • Deleted and re-created Intel RAID arrays
  • Reinstalled Windows from new installation ISO and media
  • Wiped ALL drives in the computer
  • Reinstalled Windows and tested issue with NO drivers installed

As you can see we have tried to cover all our bases but no matter what the BIOS will always crash and reset when the ASUS PG279Q monitor is attached to the system. We can restart over and over as many times as we want with the other monitors connected with no issues but as soon as the ASUS is connected it starts.

I have never seen an issue like this. I have a feeling it is something to do with the UEFI BIOS crashing for some reason due to the ASUS monitor and causing the reset. Given the lack of logging and the Gigabyte DIAG LED not being of much use we are grasping at straws. We did order a new GTX 1070 to see if the same thing happens, if it does we will be replacing the motherboard next.

Here is a video demonstrating the issue:

Here is the Gigabyte BIOS DIAG LED when it resets to default.

You can see it reset when the DIAG light shuts off and comes back up. The BIOS codes are ambiguous at best.

If you have any ideas, comments, or suggestions please contact me using the Contact Me page.

Announcing Tim’s Tech Tips [TTT] & Site Changes

I am announcing that I will be regularly doing tech reviews (I am calling it Tim’s Tech Tips or TTT for short) on all kinds of items. This includes but not limited to switches, routers, smartphones, access points, smart watches, computer components, monitors, etc. My goal is to post at least one review a week. I will eventually move to video reviews when I have the time but for now, they will reside here as traditional text reviews.

Being in the IT industry, I tend to work with everything from low-end to high-end equipment and most of the time you cannot find reliable reviews on the equipment. My goal here is to give an honest review on the hardware that my clients and myself personally review. If a company does provide me a sample for review purposes I will be sure to disclose that. However, being a man of integrity and morals I will give them an HONEST review and the fact that I received it for that purpose will not change a thing.

I have a few lower end/SOHO items, Sophos UTM series firewalls, UniFi Access Points, and Droid Turbo 2 that I am working on reviews for right now. Be sure to subscribe to the site via email on the sidebar or just follow my facebook page (located at the bottom of the site).

Along with product reviews, I will be writing articles to resolve issues with hardware and software. I have posted a few fixes for numerous SOHO and enterprise products and even though they are a few years old now they still get about 30-40 hits a day. As an IT professional that learned on the job I know how valuable internet resources can be when you are trying to resolve an odd issue you are having with a piece of hardware or software you have. I have one in the works right now for the NetGear R7000 router that I have at home for my main AP that I am doing a write up on to correct wireless connection issues I was having.

I got this inspiration from Linux tech tips but there are a lot of things he does that are NOT recommended for an actual production environment (like their weird RAID setup on their server that failed). I have years of experience in designing, installing, and maintaining actual corporate networks that range in size from simple single site installations to multi-site and multi-state sites. I have clients that have deep pockets and some that don’t. Having this experience allows me to put together solutions that fit the budget and get the best solution for the client.Don’t get me wrong about Linus though. He is a cool guy and has cool reviews but he is more geared towards the PC enthusiast/gamer versus the enterprise IT person.

Don’t get me wrong about Linus though. He is a cool guy and has cool reviews but he is more geared towards the PC enthusiast/gamer versus the enterprise IT person, this is where I plan to fall into place. I will specify recommended capacities and what kinds of applications I would recommend the item being reviewed for so that you can make sure you are getting something that is going to work for your application.

In addition, to providing more frequent and high-quality reviews and content, I have added Google AdSense ads to the site in places that do not intrude on the experience. I have done this to try and get the site to a point where I can take some time away from my normal duties to work on reviewing, acquiring, and testing equipment that is beneficial for people.

Thank you, everyone, for following my blog for as long as they have. We get about 200-250 unique hits every day already. I plan on growing the site and content. If the Tim’s Tech Tips takes off I will break it off to a separate domain and make it a regular thing. If you have any products that you want to see on here or are having a weird issue with a piece of hardware or software drop me a line via the contact form or email me at [email protected].

Hide that annoying Windows 10 Upgrade Prompt

You all got this message already? Are you tired of looking at the icon?

This is the reservation screen:

This is the notorious tray icon:

And this is the solution:


Safely hides the GWX (Windows 10 Reservation Tray Icon) and disables it until you restore or install Windows 10. This tool has no harm to your system or your reservation and can be restored at any time.


10 Hider Download