Asus B0 Error - Dead Mobo/CPU? - Troubleshooting - Linus Tech Tips

Maybe your like

Jump to content

Existing user? Sign In
Sign In
- Remember me Not recommended on shared computers
- Sign In
  Forgot your password?
Or sign in with one of these services
Sign in with X Sign in with Microsoft Sign in with Google Sign in with Steam Sign in with Discord
Linus Media Group is not associated with these services
Sign Up

Forums
Community Standards
All Activity
My Activity Streams
- Status Updates
- Recent Topics
More
- Blogs
- Gallery
- Events
- Downloads
- Online Users
- Staff
- Forum Subscriptions

Recent Topics

Home
The Workbench
Troubleshooting
Asus b0 error - dead Mobo/CPU?

Asus b0 error - dead Mobo/CPU?

By Elcapitane August 10, 2020 in Troubleshooting Share https://linustechtips.com/topic/1232627-asus-b0-error-dead-mobocpu/ More sharing options... Followers 2

Elcapitane
Member

I have an 4-5 yr old secondary workstation that suddenly died on me. I am guessing it's a dead CPU - or motherboard, but before I replace it, I figured I'd double check and see if anyone got some good advice here. It's an Asus X99-A II motherboard and an 6800K CPU.

It's been running fine until today, when I noticed the AIO radiator fans where running very fast and loud. Which is weird, because the computer has been sitting idle for the last week or so, and I know it was idle and ok just last night.

Got no image on the monitor, so I reset the computer and still no signal.

Looking at the motherboard I noticed the DRAM LED was lit up orange, and the code b0 was lit up.

b0 seems to be "Runtime Set Virtual Address MAP Begin" according to ASUS website. Not quite sure what that means though.

Power cycle, still same result.

I have 8x16GB RAM sticks installed, so first thing to test was to re-seat all of them. Still same result.

I tried booting with a single stick, another stick, different slots etc. Always the same result. I even tried with no RAM installed. Took out the GPUs. The same result every time.

I cleared the CMOS, disabled the XMP jumper on the motherboard and even tried the MemOK button (which flashes DRAM LED for a few seconds, then switches to RED on CPU LED, reboots and repeats)

So far nothing gets me past the b0 error.

So, at this point, I am suspecting the RAM is ok, but actually the Motherboard or CPU is fried. I would assume the CPU since it was overclocked, but the Motherboard throwing and stopping at the DRAM LED, and not the CPU LED, throws me off a little bit.

Have I missed anything? Any other suggestions at this point?

Thanks!

Link to comment

https://linustechtips.com/topic/1232627-asus-b0-error-dead-mobocpu/

Share on other sites

Link to post

Share on other sites

3 months later...

CreepN
Member

Did you find a solution?

Link to comment

https://linustechtips.com/topic/1232627-asus-b0-error-dead-mobocpu/#findComment-14287209

Share on other sites

Link to post

Share on other sites

10 months later...

Nuron
Member

My issue for this exact problem was pinched AIO cable, hard shorted something, replaced cooler and back up.

Link to comment

https://linustechtips.com/topic/1232627-asus-b0-error-dead-mobocpu/#findComment-15077493

Share on other sites

Link to post

Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign in

Already have an account? Sign in here.

https://linustechtips.com/topic/1232627-asus-b0-error-dead-mobocpu/

Followers

Go to topic listing

Troubleshooting

Featured Topics
- I Love WU - 2026
  HoldSquat · January 8
  151
Topics
- Mod Surface Studio 2 Screen
  Gecko · 21 minutes ago Posted in Hobby Electronics
  0
- PC Black Screening During Game Launch or Driver Updates.
  Devilkiller · 1 hour ago Posted in Troubleshooting
  2
- best free vpns now in chrome web store or as seperate app
  Multi Cat Generation · 1 hour ago Posted in Programs, Apps and Websites
  1
- AMD Ryzen 5 3500U Mini PC Opinions
  Slo2025 · 2 hours ago Posted in Laptops and Pre-Built Systems
  3
- No clue what happened to my network adapter
  tinpanalley · 2 hours ago Posted in Troubleshooting
  1
- DBRAND RANT
  Remixt · 3 hours ago Posted in LMG Sponsor Discussion
  3
- DP/DP/HDMI won't work DP/DP/DP does
  Psittac · 4 hours ago Posted in Displays
  3
- Why isn't UI as polished as it used to be?
  treysblackshoes · 5 hours ago Posted in General Discussion
  4
- Finding a solid OLED 27" 1440p monitor for around 600-1000 euro
  Rajivrocks · 5 hours ago Posted in Displays
  13
- fix gpu?
  apoyusiken · 5 hours ago Posted in Troubleshooting
  3
Join our Discord server Get LTT merch Support us on Floatplane Support the forum
play_circle_filled
Latest From Linus Tech Tips:

HP has Subscription Laptops Now
- Watch Now
- More Videos
- Discuss
play_circle_filled
Latest From ShortCircuit:

Can this save your phone?
- Watch Now
- More Videos
play_circle_filled
Latest From TechLinked:

Companies Sue for $13,000,000,000,000
- Watch Now
- More Videos
play_circle_filled
Latest From GameLinked:

Valve...Don't Do This
- Watch Now
- More Videos