Question Gigabyte Z390 Aorus Ultra First Boot Issues

KD18

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Aug 4, 2010
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Hello everyone,

This afternoon, I put together a new build but was unable to boot the finished product. For whatever reason, my motherboard keeps restarting in an infinite loop and showing codes C1 and sometimes 7F. Also, I noticed that, once it finds an error code, the bottom right red LED stays on for DRam. So, it makes me think that something is wrong with the ram / slots.

To test this out, I removed all 4 ram modules and ran with each module at each separate slot. Unfortunately, this results in the same error codes. When that didn't work, I removed the video card and ran with just the CPU/RAM - which still had the same issues. Finally, I've read that tightening down on the cooler can cause issues with ram slots; so, I tried loosening my cpu cooler (it's a massive thermalright Le Grand Macho RT, which is very heavy). That didn't solve the issue either.

What would you recommend doing at this point? I'm thinking that it's a dead board unfortunately, but I have no definite way of telling. Would an improperly installed NVMe SSD cause an issue like this - since I've never installed one before? Should I take this to a local computer shop? I'm at a loss for what to do and am extremely disappointed :(....

Parts:
CPU: i9-9900k
Motherboard: Gigabyte Z390 Aorus Ultra
GPU: EVGA Geforce RTX 2080 Super FTW3
Ram: 4X 8Gb GSKill Trident Z 3200 mhz at 14 CAS latency F4-3200C14-16GTZR (was on GSkill ram configurator but not found in QVL for the mobo)

Thanks for any help you can provide!
 

KD18

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Aug 4, 2010
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If I power on the board without any RAM installed, it actually gives me a different code (7F) - which doesn't have any meaningful message associated with it in the manual.
 
It's a Z390 board, so all 9th Gen CPUs are supported on original shipping UEFI. Based on your test, it looks like a faulty board. RAM you have is common in general, plus it's on RAM configurator and tested by G.Skill themselves. Tried reconnecting all power cables. Removed CMOS battery for a bit. Outside of that, it's likely needing an RMA started.
 
True, looks like it could be 2 identical kits. This is never guaranteed to work as you mention, but I admit I've done it myself in the past with no real issue. Maybe a slight boost in DRAM voltage. Still, it's common stuff, and they do mention trying each stick by itself individually in each slot with no luck.
 

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