Unknown Q-Code ASUS X870E-E MOBO

poor_boy_pc · May 24

Just finished my build, I'm listing everything just to be thorough.

NZXT H9 Flow - All White - CM-H91FW-01 - Dual-Chamber Mid-Tower Airflow Case 10x120mm Fans or 7 fans and 360mm liq cooler

MSI MAG CoreLiquid I360 Black - AIO ARGB CPU Liquid Cooler - Infinity Mirror Design - UNI Bracket - 360mm Radiator -

ASUS ROG STRIX X870E-E GAMING WIFI AMD AM5 X870 ATX motherboard 18+2+2 power stages

G.SKILL Trident Z5 Neo Series 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6000 (PC5 48000)

AMD Ryzen 7 9800X3D - Ryzen 7 9000 Series Zen 5 8-Core 5.2 GHz - Socket AM5 120W

SAMSUNG 990 EVO PLUS SSD 4TB, PCIe Gen 4x4 | Gen 5x2 M.2 2280, Speeds Up-to 7,250 MB/s

NZXT ATX 3.1 1200 Watt 80 Plus Gold Fully Modular Power Supply

ASUS ROG Astral GeForce RTX 5080 16GB GDDR7 OC Edition

I ran first boot, no video and solid amber led on mobo, with a Q-Code of "C5". I checked the seating of all my plugs and my RAM. Booted again and same outcome. I researched the ASUS Q-Codes, and I can't find anything regarding my issue. Because, there's not even a "C5" Q-Code listed. Has anyone experienced this or have an idea of what I'm facing here? Thanks.

AndrewAsd · May 24

C5 seems to be a memory related error. It also seems that for some people the problem has been bent pins on the motherboard. Id first recommend trying just 1 stick of ram and trying the recommended memory configuration.

RONOTHAN## · May 24

C5 is a memory error, usually it failed to train the given settings. It's very common to encounter if you're doing manual memory overclocking, though this is the first I've heard of it being achieved on first boot. Either way though I'd start troubleshooting a memory issue and possibly do a CPU reseat.

For future reference, at least with AMD platforms, POST codes are standardized across a given socket, so any AM5 motherboard will give the same codes and if you just Google "c5 error code AM5" you can find that particular code relatively easily. The same thing is true with Intel to some extent, where each error code technically means the same thing, but different boards will trigger them differently and so they can mean different things in practice.

poor_boy_pc · May 24

Thanks for the super fast reply! I was just getting ready to update my op, I was still digging and found this information. I had seated my DRAM in the exact sequence that the manual suggested. But, turns out that's what the problem was. I switched the order based on a few forum posts I found, and I got a successful POST. Thank God for that, I was terrified I was going to have to start shipping hardware back to the retailer. Thanks again for the help! I've asked two questions in these forums and I've got better help and faster than any support dept ever!