Hey everyone! I recently upgraded my PC with an Intel i7 10700k CPU and noticed my NVMe drive isn't reaching its full potential speed. I suspect it might be due to limited PCIe lanes on the CPU. After upgrading my GPU to a Gigabyte 5080, my original system drive failed, so I replaced it with a WD Black SN7100 500GB. However, a speed test revealed it's running at 1x instead of the expected 4x.
My current setup is primarily used for video editing, and I was hoping to have one NVMe for Windows, another for cache, and a large one for projects. Here are some key details:
- Motherboard: Gigabyte Z490 Vision D
- GPU: Gigabyte 5080 Gaming OC
- RAM: 64GB across four sticks
- Drives: The new NVMe is my system drive, while I have other NVMe drives functioning normally.
Could my i7 10700k's lane limitations be causing this issue? Could there be a hardware problem, or could it be related to how the NVMe is seated? Will my system be okay until I can upgrade to a newer model, or should I be concerned about damaging the WD drive? I did update my BIOS, but it initially made things worse, before improving on the second update. Any suggestions?
2 Answers
It could definitely be related to the PCIe lanes from the CPU. The i7 10700k has 16 lanes, and if your GPU is using all of them, that limits the bandwidth for other devices like your NVMe drives. Also, check which PCIe slots you're using for your drives; the manual suggests that the M2A_CPU slot can cause some conflicts with SATA ports. Make sure your NVMe is in the right slot that can handle its speed!
You're right that the i7 10700k only supports PCIe 3.0, so your new SSD should still reach decent speeds, but you’re right to keep an eye on that 1x issue. Make sure that the NVMe is properly seated; even a small misalignment can cause it to underperform. If it's still acting up, it might be worth testing with another drive if you can, just to rule out any potential hardware failure.
Yeah, the manual notes that the M2A_CPU connector shares bandwidth with certain SATA ports. If you've got anything plugged into those, it might slow down your NVMe. Just stick to SATA2 and SATA3, as those won't interfere with the M.2 slot.