I recently upgraded my motherboard, CPU, and memory. The new system uses an ASUS B650E motherboard, 32GB of DDR5-6000 RAM, and a Ryzen 7 7800X3D, while I kept my RTX 3080 Founders Edition, power supply, and SSD. Before the upgrade, I was using an ASUS B550 board, a Ryzen 5 5600X, and 16GB of DDR4 memory.
Performance has been inconsistent since the swap. Wardogs improved from struggling at low settings to running around 60 FPS at 1440p with medium settings. However, The Blood of Dawnwalker dropped from a fairly stable 60 FPS to barely over 30 FPS even on low settings. Crimson Desert also fell from roughly 60 FPS in most areas to around 45–50 FPS, despite using adjusted settings and DLSS.
I have already used DDU to remove and reinstall the graphics drivers, confirmed that the monitor is connected to the RTX 3080 rather than integrated graphics, checked the GPU power connection, and run benchmarks such as FurMark and UserBenchmark without seeing obvious hardware problems. I have also installed the motherboard drivers, but I am still unsure whether an old Windows installation or leftover drivers could be causing the issue.
Is this likely to be a software or driver problem, an incorrect BIOS or memory configuration, or is the RTX 3080 simply being pushed harder now that the CPU bottleneck has been reduced? I expected the 3080 to remain suitable for 1440p and would like to troubleshoot the new system before considering another expensive upgrade.
4 Answers
This sounds more like a platform or software configuration problem than a dead GPU. Install the latest AMD chipset drivers and every relevant driver from the motherboard support page, while skipping unnecessary utilities. Also check BIOS settings such as PCIe link speed, Resizable BAR, EXPO memory support, and whether the GPU is actually running at its expected PCIe width and speed.
If the old Windows installation has accumulated drivers from the previous motherboard, a clean Windows installation or an in-place reinstall may be worthwhile. An in-place reinstall keeps your files and installed programs, while a fully clean install is the more thorough option if the problem continues. Afterward, compare performance with a repeatable benchmark rather than relying on UserBenchmark alone.
A reduced CPU bottleneck can make the GPU work harder, but that should generally improve or maintain performance rather than suddenly cut it in half. The RTX 3080 is still a reasonable 1440p card, although newer games may require DLSS, reduced ray tracing, or lower textures. Before replacing it, monitor GPU usage, clock speed, temperature, power draw, VRAM usage, and CPU usage during the affected games to find out whether the card is actually running normally.
What was the previous hardware, and are you using the same Windows installation? Moving from a B550 board and Ryzen 5 5600X to a B650E board and 7800X3D can leave behind chipset, storage, and other device drivers. If Windows was not reinstalled, that is one of the first things I would investigate.
The old system used an ASUS B550 motherboard, a Ryzen 5 5600X, and 16GB of DDR4. I kept the same Windows installation after replacing the parts.