New Build: 4080 Super fails to show anything, white VGA indicator appears during initial boot.
New Build: 4080 Super fails to show anything, white VGA indicator appears during initial boot.
Just built a new PC for a much needed upgrade and got an ASUS TUF 4080 Super as the GPU.
I've powered the system previously with integrated graphics to check (while waiting for the GPU to ship) and everything worked fine, but after installing the GPU with the included 12VHPWR cable from corsair I get a white VGA light and no output on the HDMI.
The GPU came with its own 12VHPWR adapter that goes to 3 PCIE 8-pin connectors, however the one included with my PSU only goes to 2 PCIE 8-pin connectors. After some googling it looked like this would be fine (and I have another connector on order anyways), but no luck. There's no red power light on the GPU, and all of the fans spin up on boot
Any ideas what to do to troubleshoot? I've re flashed the BIOS using the flashback utility because of an issue with my RAM I didn't catch, but afterwards I was able to boot into BIOS using integrated graphics.
Do I need the 3-PCIE 12VHPWR adapter to use the card?
My build:
Mobo: Asus ROG Strix B650-A Gaming Wifi
CPU: Ryzen 9 7950X3D
GPU: Asus TUF RTX 4080 Super
Cooler: Corsair H150i Elite Capellix
RAM: Corsair Vengeance DDR5 32GB (2x16)
PSU: Corsair RM850e (850W) (using included 12VHPWR adapter at the moment)
Storage: Samsung 980 Pro 2TB M.2 SSD
Nothing to boot from (no OS) is possible. The PSU problem might be due to the mediocre quality of the Corsair RMe. For PCs with a dedicated GPU, I wouldn't expect anything short of a high-quality PSU (like Seasonic Focus or Corsair RMx/RMi), whereas a top-tier PSU is recommended (such as Seasonic Vertex/PRIME or Corsair HXi/AXi). If the motherboard would be damaged, you wouldn't be able to enter UEFI with the integrated GPU. Memory training can take some time. It seems the CMOS battery might be depleted; otherwise, the system would attempt memory training and adjust settings.
This indicates the GPU is not functioning properly.
Although ideal, it's not essential. RTX GPUs using a 12VHPWR adapter can operate under limited power conditions. With one 8-pin PCI-E connection, the GPU is restricted to 150W. Two such connections allow up to 300W, and connecting all three 8-pin cables could reach 450W—sufficient for an RTX 4080 Super, which draws 320W.
This implies other PC components will still function correctly. However, the RTX 4080 Super is experiencing problems.
Two suggestions:
1. Use a second dedicated GPU (borrow from friends/family if needed)
2. Test the RTX 4080 Super in another PC to observe behavior
As far as I know, your RTX 4080 Super is likely dead and should be returned via RMA.
You can bring the GPU or entire PC to a repair shop for diagnosis, but I’m confident they’ll agree it’s a dead unit.
After further troubleshooting, I managed to get the GPU recognized by ensuring it was connected properly and then updating the BIOS on my motherboard using the flashback tool. I can now boot into BIOS through the GPU, though I’m uncertain if the QLED boot is a problem because I have an M.2 but no operating system installed yet. If I leave it running, it will shut down abruptly, and turning it back on causes all lights to flash once before nothing happens. Removing power from the PSU, waiting a short time, and trying again results in it coming back on briefly, then shutting off again later. I’m unsure what’s causing this issue, but I’m hoping it isn’t a faulty GPU since replacing one is difficult. Could a defective motherboard or power supply be responsible?
Nothing to boot from (no operating system).
PSU problems might occur because the Corsair RMe is of average quality. For PCs with a dedicated GPU, I wouldn't expect anything less than a solid PSU (like Seasonic Focus or Corsair RMx/RMi), whereas high-quality PSUs are recommended (such as Seasonic Vertex/PRIME or Corsair HXi/AXi).
If the motherboard would be damaged, you wouldn't be able to enter UEFI with the integrated GPU.
Memory training can take some time.
It seems the CMOS battery might be depleted; otherwise, the system would attempt memory training and set itself up based on the components available, including the CPU.
Just to mention, these are not PCIe connectors from the power supply side. The eight-pin connectors on that side usually support 300W or more, making them different from the adapter that came with your graphics card.
It seems fine, I’ll attempt to swap out the CMOS battery to check if it’s truly dead, and I’ll verify all connections to ensure everything is secure.
I’ll also review the power consumption details; a larger PSU should provide more headroom, so I’ll consider your suggestions.
Good to know the GPU is still outputting data, which suggests it’s not broken—getting it installed was challenging.
Thanks for the assistance! I’ll update you once I’ve tried it.