Resolving issues with a non-working PCIe slot following a CPU upgrade on the ASUS PRIME Z370-P and Intel i7-8700K.
Resolving issues with a non-working PCIe slot following a CPU upgrade on the ASUS PRIME Z370-P and Intel i7-8700K.
Hello, My PCI Express port failed after upgrading the CPU. It functions properly with the previous CPU. The board is an ASUS PRIME Z370-P (LGA 1151). I used Intel Core i3-8100 to i7-8700K, 32 GB RAM, and a 550W power supply. After switching to the i7-8700K, my GPU (RTX 4060) stopped working. With an integrated card I could boot into Windows, indicating the new CPU is functional at least partially. I suspect the problem lies with the port rather than the GPU. The PCI Express slot in question supports x16 mode and works with x1/x2/x4 devices. The slot that always works is x16, while the one with the i7-8700K only supports up to x4. When I replaced the CPU, everything worked again. I checked RAM, contacts, CPU condition, and BIOS updates. The motherboard seems compatible. I tried using M.2 NVMe in the PCIe slot, but it fails as long as the new CPU is installed. Could you help identify whether the issue is with the CPU or the motherboard? Thanks! Vrata
Thank you, I completed the task and everything appeared satisfactory.
has this processor ever been desoldered before?... because it's a newer model, it's usually easy to remove... (standard thermal paste on the inside of the IHS) if it has happened, liquid metal could have migrated in unexpected places during shipping. Another point is the 550W PSU—it should consume roughly 30W more than the previous one. Is your BIOS up to date? There are many possible reasons why your new system isn't functioning as expected.