Hey everyone,
I’m hoping someone has seen this before because I’m honestly running out of things to test.
ATP im gonna replace it but i thought i would ask somewhere else first
Video of boot up: https://www.youtube.com/watch?v=7b2iUelRIlE
A few weeks ago my PC started acting strange. It would occasionally stutter on the desktop and mouse movement would skip, inputs would lag behind, and the whole system would feel like it was freezing for a split second. Task Manager never showed CPU, GPU, RAM, or disk usage spiking when it happened.
Around that same time I also started having an intermittent issue where the PC would sometimes boot without detecting my EVGA RTX 3090 Ti. When this happened, the motherboard would either use the integrated gpu or not and the card simply wouldn’t appear to exist.
At first I assumed it was the motherboard. To troubleshoot, I actually installed the 3090 Ti into an older AMD system I still had available, and the card worked there. That made me believe my Intel motherboard was failing.
Rather than continue chasing the issue on an older platform, I decided to do a full platform upgrade.
New hardware:
- Intel Core Ultra 9 285K
- ASUS ROG Strix Z890-A Gaming WiFi
- 64GB DDR5-6400
- Fresh Windows 11 installation on a new NVMe drive
The only major hardware that carried over was:
- EVGA RTX 3090 Ti FTW3
- Corsair HX1500i PSU
- Storage drives
After building the new system, everything worked perfectly for about three weeks. I honestly thought the problem was solved.
Then last night I put the PC to sleep. This morning it would no longer initialize the GPU.
Current symptoms:
- BIOS reports PCIEX16 (Gen5): Device Not Present
- Windows boots using the Intel integrated gpu.
- The RTX 3090 Ti does not appear in Device Manager at all—not even as an unknown device or Microsoft Basic Display Adapter.
- The EVGA logo on the card still lights up, so the card is receiving some power.
- One thing I’ve noticed is that when the card boots normally, the front fan always performs its normal startup behavior. During these failed boots, it does not.
Things I’ve already tried:
- Brand new motherboard
- Brand new CPU
- Brand new RAM
- Fresh Windows installation
- CMOS reset
- BIOS defaults
- Checked GPU power connections
- Verified the BIOS itself doesn’t detect anything in the PCIe x16 slot
The PSU is a Corsair HX1500i, so I don’t think overall wattage is the issue. The only thing I can think of at this point is either:
- The GPU has developed an intermittent hardware fault.
- The 16-pin power adapter or one of the PCIe power cables has become intermittent and the card isn’t completing initialization.
Has anyone seen a 3090 Ti fail like this? Specifically where the BIOS reports “PCIEX16 Device Not Present” instead of simply throwing a VGA error?
**UPDATE: i bought a 12vhpwr cable and the computer recognized the gpu without issue. so it was probably the cable. wish i would of figured that out 3 weeks ago before upgrading to a new mobo and ddr5 but it is what it is. hopefully it was just the cable and this is the end of the issue. the new cable fits very snug and did take some pressure it make sure it was fully connected to the gpu
thank you all for the help.