s about laptop PCI-E versions
s about laptop PCI-E versions
Hello everybody, sorry this might be a simple question but during my research it appears my Ryzen 5900hx in the laptop only officially supports PCI-E 3.0 according to AMD's website. Yet when I open CPU-Z and switch to the mainboard section it says it’s actually using a PCI-E 4.0 connection to the GPU, showing 8.0 GT/s which is PCI-E 4.0 8x. Is this just an error in reporting? I wonder if the laptop truly has a Gen 4 connection between the CPU and GPU. If so, does it only connect to the graphics card? Are there any special actions from ASUS for linking the CPU and GPU? For example, if I upgrade to a Gen 4 SSD in the future, would that benefit from it? Or would it likely be limited to just the GPU connection, not NVME? Thanks for your time.
CPU-z might be drawing incorrect conclusions. Check the source: https://www.notebookcheck.net/Performanc...953.0.html. GPU-z indicated RTX 30 GPUs connected via AMD CPU on PCIe 3.0, and similar details appear in the laptop's screencaps for the RTX 30. It's better to rely on the manufacturer's official information rather than third-party assessments. This issue only arises if you intend to install a PCIe 4.0 SSD, as PCIe bandwidth isn't typically an issue with GPUs. The main concern is GPU VRAM usage.
The CPU and GPU are compatible with PCIe 4.0. The chipset probably doesn't support it, meaning peripherals not directly connected to the CPU will use PCIe 3.0. For example, on B550, the CPU supports PCIe 4.0 for both "graphics" slots while other slots remain at PCIe 3.0. X570 offers full PCIe 4.0 support.
Laptops operate differently from desktops because their CPUs and GPUs are built for portability, even with powerful chips like the 5900hx. When considering upgrades such as a PCI Gen 4 M2 drive, remember that the laptop will default it to PCI 3.0, meaning you might end up paying more for reduced performance.
CPU-z might be drawing incorrect conclusions. Check the source: https://www.notebookcheck.net/Performanc...953.0.html. GPU-z indicated RTX 30 GPUs connected via AMD CPU on PCIe 3.0, and similar details appear in the laptop's screencaps for the RTX 30. It's better to rely on the manufacturer's official information rather than third-party assessments. This issue only arises if you intend to install a PCIe 4.0 SSD, as bandwidth limitations are uncommon with GPUs. The main concern is VRAM exhaustion by the GPU.
There is another thread about the 5600G with the same architecture, stating it uses only PCIe 3.0. I can't verify this from diagrams or details. The only clear diagram shows the silicon and mentions PCIe. Would you like to know if direct CPU connections are PCIe 4.0?