Issue with Gigabyte B760M C POST involving dGPU
Issue with Gigabyte B760M C POST involving dGPU
Hello,
I’m looking for ideas to help resolve the issues I’m experiencing with my latest build.
New components:
- Intel Core i5-12600K
- GIGABYTE B760M C LGA 1700 Intel B760
- MSI MAG A650GL Fully-Modular, 80 Plus Gold, 650W
- G.SKILL Flare X5 Series AMD EXPO 32GB (2 x 16GB)
- Team Group MP44L M.2 2280 1TB PCIe 4.0 x4
- be quiet! Pure Rock 2 CPU Air Cooler | 150W TDP | LGA 1700
Reused items:
- MSI GeForce GTX1060 Gaming 6G
- From the previous system, no issues with booting or graphics output
Initial setup notes:
The new build had no visual output at first. I connected a case speaker and heard five beeps. The codes suggested CPU, RAM, or GPU problems. After removing the GPU, the system started POSTing and booted a USB drive without issues. Integrated graphics still worked from the motherboard.
Online research:
I found several discussions about motherboard compatibility in similar setups, especially with Gigabyte and AORUS models. I followed some recommendations.
BIOS updates tried:
- Changed BIOS firmware to f11d via Gigabyte support site – no improvement.
- Enabled CSM in BIOS, disabled integrated graphics, confirmed PCI slot was set as primary display – system still failed to POST with GPU installed.
- Reset BIOS settings between attempts since updating without success.
Reinstalled the GPU on the older system to confirm it didn’t break and played games properly.
Questions:
Given the GPU is relatively old, are there any BIOS configurations I should adjust? I’m considering a repair rather than returning if it’s a straightforward fix.
Also reviewed the POST sticky thread for additional insights.
Yes, I used only the new cables provided with the modular supply.
That was a poor copy/paste from Newegg. There is already one M.2 drive installed, and the board has two slots in total.
About the M.2, it's currently blank. I have a USB drive with Win11 installation media and some Linux live ISOs. If I remove the dGPU, I can POST (just a beep) and boot into any of those OS launchers.
Visit Gigabyte's site and locate the relevant motherboard User Guide/Manual.
Make sure you're on the correct Gigabyte website.
Check the instructions carefully, particularly for M.2 setup and configuration.
This should be a minor oversight or mistake.
Your motherboard features an 8 pin EPS port. Is it connected?
The port provides additional power for graphics cards.
Does the 8 pin PCIe connector fit the graphics card?
Are all connectors properly plugged into the correct outlet on the PSU?
Consider testing with different PSU cables of the appropriate type; one might be faulty.
Hello, your observation about the manual's source is valid. The GBs appeared updated compared to the version I accessed online, but there don't seem to be any functional changes. I verified the M.2 setup and even removed it from the board. The manual doesn't mention any configuration options or jumpers connected to the M.2 at all.
Thank you, this is my initial experience with a modular supply, which has made me a bit cautious about its setup. I verified that the specific 8-pin "CPU" cable is connected to the motherboard, and the PCIe-specific 6+2 cable is plugged into the GPU.
I have backup cables for both types and have swapped them out. Additionally, I've relocated the connections on the power supply to different sockets within the CPU/PCIe bank of 8-pin slots.
With the modular PCIe cable, I now have two separate cables, each with two connectors, allowing me to run multiple GPUs simultaneously. There is no single 6+2 PCIe cable available. I’m unsure if there’s a distinction between single and multiple GPU configurations in terms of power supply wiring, but I’m not entirely sure. Do you have information about whether there are single versus multiple GPU PSU cable setups?
I have utilized spare modular PSU cables for both the motherboard 8-pin and PCIe 6+2 connections, as well as changed the PSU slots they connect into.
I also checked the M.2 setup according to the manual.
Looking for additional tips on handling POST failure when only a graphics card is installed.