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October 17, 2022 - Edit: I got rid of the qcode 42 by removing a GPU support wth RGB. I had it daisy chain to my Lan Li’s strimmer cable. It posted to code A9 which means set up. I got back into windows, stable stress test with 3D Mark. Edit2: I stress test the system with prime, memtest, 3D mark, everything was stable. What was strange was the bios giving me a tighter memory timing , it went from 50cl to 40cl …..and I notice new profile in the updated asus bios/uefi

Asus

rog-forum.asus.com › t5 › amd-600-series › x670e-e-qcode-42 › td-p › 936364

x670e-e qcode-42 - Republic of Gamers Forum - 936364

June 15, 2023 - Hello Everyone, I'm getting error code 42 with a white light while trying to boot up. I restarted after gpu update but not opening pc.when i started or restarted pc,i never see bios screen or something. I tried change ram and gpu slot,cmos clear, on board hdmi socket.Nothing happened.Do you have an...

Discussions

First PC build, yellow DRAM light, q-code 42

Specs: Asus Rog Maximus XI Hero I7 9700k 2080 TI First tried G.Skill f42666c19d32gis (found out wasn't on compatibility list) Just got corsair vengeance cmk32gx4m2b3200c16 I've tried updating bios, I've tried a single ram chip in every slot, I've tried reseating CPU, I've tried other things too, but I forget everything specifically. I always get Q-code 42... More on forums.tomshardware.com

forums.tomshardware.com

July 9, 2020

Solved: Q-Code 41 - 42 - Republic of Gamers Forum - 1070576

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. ... Hello all. I have the following components: ... I am getting code 41 - 42 and sometimes goes up to 43 when playing games but mostly stays at 42. On the manual itself I cannot find ... More on rog-forum.asus.com

rog-forum.asus.com

January 15, 2025

Unable to Post (qcode 42 > 62) - Republic of Gamers Forum - 936694

Hi everyone, My built my PC in November 2022 with EXPO and AMD overclocking enabled and it has been running without issue since then. For an unknown reason, the PC was unable to post this morning after completing a restart. The Q-code was 42. I tried clearing CMOS to no effect. More on rog-forum.asus.com

rog-forum.asus.com

June 15, 2023

MOBO cycling through Q-codes - ROG Forum - ASUS

Hi all, My MOBO is cycling through Q-codes. Typically, I’m getting error codes 33-37, and sometimes 42-49, 50-58. And it just keeps cycling through these error codes non stop even after I'm in Windows 11. My computer feels fine though. Just in windows and doing my own thing but seeing these ... More on rog-forum.asus.com

rog-forum.asus.com

March 5, 2024

Asus

rog-forum.asus.com › t5 › amd-600-series › q-code-42-red-cpu-light-pc-will-not-post › td-p › 895916

Q Code 42, red CPU light. PC will not post. - Republic of Gamers Forum - 895916

February 3, 2023 - 2/10 of these crashes were hard crashes, including the final crash where I got stuck at the 42 code. The other 8 crashes I remained in windows and the PC ran fine. I'm using a temporary Cooler Master Hyper 212 CPU cooler because the Kraken 360mm AIO was delayed for shipment. Maybe this caused the problem? Multiple people are talking about similar Q 42 issues on Reddit.

Tom's Hardware Forum

forums.tomshardware.com › home › memory

[SOLVED] - First PC build, yellow DRAM light, q-code 42 | Tom's Hardware Forum

July 9, 2020 - Specs: Asus Rog Maximus XI Hero I7 9700k 2080 TI First tried G.Skill f42666c19d32gis (found out wasn't on compatibility list) Just got corsair vengeance cmk32gx4m2b3200c16 I've tried updating bios, I've tried a single ram chip in every slot, I've tried reseating CPU, I've tried other things too, but I forget everything specifically. I always get Q-code 42, which isn't listed in the mobo q-code table, with the dram light yellow.

Asus

rog-forum.asus.com › t5 › gaming-motherboards › q-code-41-42 › td-p › 1070576

Solved: Q-Code 41 - 42 - Republic of Gamers Forum - 1070576

January 15, 2025 - Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. ... Hello all. I have the following components: ... I am getting code 41 - 42 and sometimes goes up to 43 when playing games but mostly stays at 42. On the manual itself I cannot find ...

Asus

rog-forum.asus.com › t5 › amd-600-series › unable-to-post-qcode-42-gt-62 › td-p › 936694

Unable to Post (qcode 42 > 62) - Republic of Gamers Forum - 936694

June 15, 2023 - Hi everyone, My built my PC in November 2022 with EXPO and AMD overclocking enabled and it has been running without issue since then. For an unknown reason, the PC was unable to post this morning after completing a restart. The Q-code was 42. I tried clearing CMOS to no effect.

Asus

rog-forum.asus.com › t5 › amd-600-series › mobo-cycling-through-q-codes › td-p › 914312

MOBO cycling through Q-codes - ROG Forum - ASUS

March 5, 2024 - Hi all, My MOBO is cycling through Q-codes. Typically, I’m getting error codes 33-37, and sometimes 42-49, 50-58. And it just keeps cycling through these error codes non stop even after I'm in Windows 11. My computer feels fine though. Just in windows and doing my own thing but seeing these codes on the MOBO cycling which isn't normal.

ASUS

asus.com › support › faq › 1043948

[Motherboard] Common Q-CODE(Error CODE) and Troubleshooting | Official Support | ASUS Global

Through the common Q-CODE, identify common installation problems and component problems of the motherboard.

Asus

rog-forum.asus.com › t5 › amd-600-series › asus-error-codes › td-p › 899579

Asus Error Codes - Republic of Gamers Forum - 899579

December 3, 2023 - Tyberious wrote: I found that error code 42 is due to unstable memory. This is correct. it's more frequently seen on XMP and D.O.C.P ram. Modules with the timings 40-40-40-77 ideally need changing to 40-40-40-80.

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reddit.com › r/asus › asus x670e motherboard q-code 42 error

r/ASUS on Reddit: Asus X670E Motherboard Q-code 42 Error

November 15, 2022 -

Computer Specs: CPU: AMD 7950x Mobo: Asus X670E Crosshair Hero Ram: 32gb ddr5-6000 cl30 Case: Lian Li O11D Evo MC Exclusive PSU: SeaSonic PX-1300W GPU: MSI 4090 Gaming Trio Fans: x12 Lian Li Infinity Fans Cooling: NZXT Z73 AIO

Anyone know the solution to this q-code error?

I am getting BSOD frequently and have tried installing a clean windows from a bootable USB drive, purchased the same new ram to swap.

My computer will boot and make it to windows.

I am thinking it's a faulty motherboard, however, how can I tell?

I am just past the 30 day mark so I heard people RMA their board. Need to look into that process if it's the Mobo.

Top answer

1 of 4

What does the manual say about the QCode error?

2 of 4

What is the BSOD error? Just knowing the error is great, but fails to tell us the actual error.

reddit.com › r/buildapc › new build, asus rog maximus xi hero not recognizing ram, q-code 42

r/buildapc on Reddit: New build, Asus Rog Maximus XI Hero not recognizing ram, q-code 42

July 9, 2020 -

So I'm not getting to post, when I boot, fans come on, rgb lights up, but I get the dram yellow light, and q-code 42 (which isn't listen in mobo's q-code table.) No display.

When I first got the problem, I called Asus CS, found out my ram was incompatible, so I ordered new memory from the list they sent me, popped it in and... nothing has changed.

I've also tried a single stick of memory in each dimm slot, reseating CPU, updating BIOS, and clearing CMOS.

Specs:

Asus Rog Maximus XI Hero

i7 9700k

Corsair Vengeance LPX (2x16g) CMK32GX4M2B3200C16

NVidia 2080ti

Would greatly appreciate any help, thanks in advance!

Edit: SOLVED, I forgot to mention I also had a firewire card, which is what ended up being the problem, oddly enough. Siig NN-FW0012-S1 Dp firewire 800 pcie

I removed that and it starts up just fine. Still need to find a solution for working firewire though.

Top answer

1 of 1

The only thing I can think of is trying a 4 x 8GB kit instead of a 2 x 16GB kit. It's possible that either the mobo or the CPU are having trouble with the 16GB DIMMs in some way.

Asus

rog-forum.asus.com › t5 › zenith-extreme-x399-e › nightmare-bios-code-42-test-nvram-etc › td-p › 745442

Nightmare BIOS, code 42: test NVRAM, etc. - Republic of Gamers Forum - 745442

March 7, 2024 - When you turn on or reboot, the message "code 42: test NVRAM" appears on the motherboard's display and then does not load. It helps several reboots or turns off the power and on again.

Asus

rog-forum.asus.com › t5 › other-motherboards › crosshair-v-formula-z-error-code-42 › td-p › 529663

Crosshair V Formula Z Error Code 42 - Republic of Gamers Forum - 529663

March 6, 2024 - It means Windows cannot load a device driver for a piece of hardware on your system and probably because there is a duplicate device already running on the system. This is caused by a sub-process that the system accidentally named incorrectly.

reddit.com › r/asusrog › what does q code 42 mean?

r/ASUSROG on Reddit: What does q code 42 mean?

November 14, 2022 -

It happened when I turned on the PC after install

Top answer

1 of 3

What does the manual say?

2 of 3

Google.com

reddit.com › r/asus › rog x670e-e strix won’t post. (code 42)

r/ASUS on Reddit: ROG X670E-E Strix won’t post. (Code 42)

October 24, 2022 -

So I’m coming over from an old Intel 8700k build and this has been absolute hell

I just slapped the board in (had to do an exchange because the previous one wouldn’t post either) with the following specs:

Cpu: Ryzen 9 7950x Gpu: RTX 3090 FE Ram: Corsair DDR5 Dom Plats for AMD - 2x16 6000 MHz 3 sata drives, 1 blank, 2 with just games and data 2 fresh nvme drives in the motherboard

And I keep getting code 42 with the q led lot being third from the left. I have done bios flashback to get the latest version but I’m at wits end on how to move forward, especially as 42 isn’t appearing in the manual! Any help would be appreciated as this has been the last two days of my life trying to get sorted.

Just got error code 99 too. Trying to fiddle with ram and pulling the drives with data off as well to at least get to bios

Top answer

1 of 5

Was there a fix to this Im having the same issue I used the PC for about 5 days now its a no post and gives code 42 Im about to RMA it

2 of 5

Error 42 for me went away after underclocking the RAM (leave xmp disabled in bios). Still early days of DDR5 so if it's not on the short QVL list it's down to luck. I got 64GB of 5200MHz (Corsair CMH32GX5M2B5200C40, 2 kits) that I couldn't get to work at that rating if my life depended on it. Kept sticking on Code 42 with a white QLED, gave up after waiting like an hour each (DDR5 takes a long time to boot, but an hour? = WTF) x 5 tries with various changes before resorting to letting it drop to auto settings (4800MHz, dunno what the timings are, auto as well). Sucks I paid like an extra $50-100 for overspec'd RAM that I couldn't get to use as advertised, maybe that will change with a newer bios if/when available. I guess it could be worse, some people simply can't get 4 sticks of certain vendors to work so are stuck with using half the ram they expected (ie 32GB instead of 64GB, a far bigger downgrade).

XDA Developers

xda-developers.com › home › other hardware › the most commonly seen q-code errors on asus motherboards, and how to fix them

The most commonly seen Q-Code errors on Asus motherboards, and how to fix them

February 22, 2024 - A Q-code LED, in case you are wondering, essentially displays a two-digit code to denote the status of your PC. It's more of a status indicator than an error code LED, and you may notice it cycling through a bunch of rapidly changing codes before it settles on one as your PC finally boots. Simply buying an Asus motherboard with a Q-code LED isn't enough, as it's equally important to know what they mean and how you can troubleshoot based on the code that's showing up on the motherboard.

Asus

rog-forum.asus.com › t5 › amd-500-400-series › q-code-41-42 › td-p › 827849

Q-Code 41-42 - Republic of Gamers Forum - 827849

March 6, 2024 - Hello I am getting a q-code 41 and 42 alternating, has someone got an idea as to why? - 827849

reddit.com › r/asus › x670e q code 42…nothing fixes it

r/ASUS on Reddit: X670E Q Code 42…nothing fixes it

October 22, 2022 -

Just installed my 4090 on my X670e Hero, and everything was working fine, all of the sudden had a hard crash and get get past Q Code 42. Tried clearing cmos, one stick of ram, no GPU, bios flashback. Let it try to boot for two hours, nothing has worked. Any suggestions before I return it and try something else before my return window closes.

Top answer

1 of 2

I just got this error did you RMA yours? its what I'm doing now, I'm very bummed its a no post no nothing just code 42 and there is no troubleshooting for this

2 of 2

Me too! I got a 4090 with 7950x, and like you, everything was fine till a crash and code 42.

CGDirector

cgdirector.com › home › troubleshoot & fix › troubleshooting asus motherboard error q-codes — everything you need to know

Troubleshooting ASUS Motherboard Error Q-Codes — Everything you need to know

August 15, 2022 - Even though debug codes are immensely helpful with troubleshooting issues in your PC, most manufacturers, including ASUS, only ship them with a handful of higher-end motherboards. You can either cover it up by attaching a piece of tape over it or you can turn the Q-Code display off in the BIOS settings.

Asus

rog-forum.asus.com › t5 › intel-700-600-series › red-code-42-can-t-post-rog-crosshair-x670e-hero › td-p › 983917

RED CODE 42 - Can't post - Rog Crosshair X670E Her... - Republic of Gamers Forum - 983917

December 30, 2023 - At first I had the RAM in A2 B2 but probably not fully in, then I tried A1 only, then A1 B1, then A2 B2 and no more orange code, but a red 42.