RTX 4090 not starting and maximum power cut = 0
RTX 4090 not starting and maximum power cut = 0
It cancels the warranty only when it's a non-stock bios not made by the manufacturer. I recall this from past experiences and am trying to recall what led to it. I regularly document everything that enters the shop, so I’ll look through those notes for my insights.
It was really considerate of you, I’d be grateful for an update. Here’s what happened: After visiting my dad, we tried the 4090. We only managed to fit it in with the riser cable, and it showed the same issue as shown in the screenshot above. With the 3060 (mistakenly thought to be a 3070ti), the sliders worked properly and were adjustable. However, connecting the 3060 to the riser caused it to boot but then lose signal. The fans kept cycling on and off without any resolution. When we attempted a reboot, it repeated the same problem—just spinning fans without a clear fix.
In short, even though the riser cable was brand new, it appears defective. I plan to test it later this week, especially since I have an OS test scheduled and need to refresh my C knowledge. I’m curious if the riser will also fail with the R7 250x, though that’s a different card and might behave differently. My suspicion is the clock-speed issue could be linked to the riser cable itself.
You might wonder why it doesn’t pass POST when plugged into the motherboard—remember the D6 code? It indicates “No Console Output Devices found,” which seems GPU or VGA-related but not a specific VGA failure (probably B2). But essentially, the board can’t recognize a graphics card. I didn’t notice it while forcing it in, but the photos suggest it’s misaligned. The top of the contact pins is slightly visible at the rear, especially since the 4090 was installed upside down in the flipped case.
The issue is resolved. The fix involved misinterpreting the manual. The cable mod, riser, and bracket I purchased didn’t specify the device type. The kit came with a Gen3 cable, but the Asus motherboard manual doesn’t indicate that enabling Auto PCI-e detection defaults to Gen4. I had to adjust the BIOS settings—select Advanced, then Onboard device configuration—to set the correct PCI-e slot. Once done, everything functioned perfectly. I’ll share this so others facing the same problem can avoid the same mistake.