ACER Nitro ANV15-51 RTX 4050 PCIE speed error - stuck at x4@4.0. but supposed to support PCIE x8@4.0

NaRa85
NaRa85 Member Posts: 38 Devotee WiFi Icon
edited November 2 in Nitro Gaming

Can the expert enlighten me about the PCI-E speed for my Laptop Nitro ANV15? I noticed that the speed is fixed at x4@4.0.

As shown in GPUZ, the RTX4050 supposed to support PCIE x8@4.0, I even run the "Render Test" but it still stuck at x4@4.0.

All the power saving mode had been turn OFF, and even the power management for RTX4050 had been set to "Maximum Performance" in Nvidia Control Panel.

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Appreciate any feedback as my curiosity is killing me. 😅

Edit:

  1. The processor is Intel i5-13420H, with 16GB 5200Mhz ram and 2 SSD.

[Edited the topic title to include the topic issue.]

Answers

  • Hars7643
    Hars7643 Member Posts: 17 Troubleshooter
    edited November 2

    yes, you are right RTX 4050 supports x8@4.0 but the processor (i5 13420h) has only 8 pcie gen4 lanes and they are shared between GPU(using 4 pcie gen4 lanes) and Gen4 SSD slot( using 4 pcie gen4 lanes). so total 8 pcie lanes at gen4 got used.

    i hope you got this.. thanks.

  • NaRa85
    NaRa85 Member Posts: 38 Devotee WiFi Icon
    https://community.acer.com/en/discussion/comment/1306516#Comment_1306516

    Thanks for the info but based on Intel spec sheet, TechPowerUp and Notebookcheck.net it supposed to have enough PCIE lanes dedicated to the GPU.

    1. Notebookcheck.net (https://www.notebookcheck.net/Intel-Core-i5-13420H-Processor-Benchmarks-and-Specs.677510.0.html)
    image.png

    2. TechPowerUp (https://www.techpowerup.com/cpu-specs/core-i5-13420h.c3058)

    image.png

    3. Intel (https://ark.intel.com/content/www/us/en/ark/products/232173/intel-core-i5-13420h-processor-12m-cache-up-to-4-60-ghz.html)

    image.png

    Probably I need to find more info on the motherboard how it distributes the lanes amongst the internal components. Is there any website that I can cross check on the motherboard?

    image.png

  • Hars7643
    Hars7643 Member Posts: 17 Troubleshooter
    https://community.acer.com/en/discussion/comment/1306616#Comment_1306616

    this info in techpowerup and notebookcheck is somewhat wrong becouse in nitro v gen5 pcie lanes are unused.. so all 8 lanes of gen5 are getting wasted . just gen4(for gpu and ssd) and gen3(ssd and few others) are in use.

    image.png

    so this line was wrong for nitro v.

  • NaRa85
    NaRa85 Member Posts: 38 Devotee WiFi Icon
    https://community.acer.com/en/discussion/comment/1306629#Comment_1306629

    I think I roughly get your idea. I assume the lanes distribution might follow such that x8@4.0 shared between the GPU (RTX4050) and the original SSD (each getting x4@4.0).

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