And just for completeness, no RAM modules installed results in a near-instantaneous Q-Code of 10 (PEI Core is started).įrom Googling Q-Code 99-related issues, one commenter noted that it’s probably storage-related. Using either slots A1 or B1, though, result in a Q-Code C5, which is not documented, but they also non-recommended memory configurations. Slots A2 and B2 alone or together and all four slots exhibit the behavior I described. They look fine to me.Īlready vacuumed the motherboard and inspected the RAM modules themselves. I took the fan and heatsink off and removed the CPU to inspect the pins in motherboard CPU socket. This what what I did before putting the CPU in.Ĭheck for broken pins (not applicable to AM5 CPUs now, but applicable to the MD socket) I combined the applicable troubleshooting steps from the above general troubleshooting page and the ASUS’ ROG motherboard troubleshooting page: ComponentĪlready double-checked that they were all connected. Pre-memory System Agent initialization is startedĪSUS has a general troubleshooting page for their Q-Codes with the following table (Intel-specific rows removed): AMD Motherboard Q-Codes (unknown not in MB documentation’s Q-Code table) Without any peripherals connected and with the various recommended RAM configurations (A2, B2, A2 + B2, or all the slots), I observed the following sequence of codes after starting the system: Q-Code The nice thing about the motherboard is that it comes with two displays that show the status of the system as it boots up. Front panel USB-C port can charge my phone.USB optical mouse laser is off (no power).No display output, although the USB-C-to-HDMI dongle LED is on.With peripherals connected, I observed the following: Kingston Server Premier DDR5 4800MT/s ECC UDIMM I’d like to tap the experience of the PC building community here since I’ve run into some trouble with booting up the parts I put together last night. Pick, Assemble and Install: Video Guide.No intentionally harmful, misleading or joke advice.No excessive posting (more than one submission in 24 hours).No selling, trading or requests for valuation.No self-promotion, advertising, begging, or surveys.No submissions about memes, jokes, meta, or hypothetical / dream builds.No titles that are all-caps, clickbait, PSAs, pro-tips or contain emoji.No submissions about retailer or customer service experiences.No submissions about sales, deals or unauthorized giveaways.No submissions about hardware news, rumors, or reviews.Please keep in mind that we are here to help you build a computer, not to build it for you. Submit Build Help/Ready post Submit Troubleshooting post Submit other post New Here? BuildAPC Beginner's Guide Live Chat on Discord Daily Simple Questions threads
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