Is 64GB DDR5 (2x32GB) supported on PHN16-71? Kingston Fury Incompatiblity?

Riverutz
Riverutz Member Posts: 5

Tinkerer

edited July 28 in Predator Laptops

Hello,

I have an Acer Predator Helios Neo 16 with the following specs:

  • Model: PHN16-71
  • Manufacturing Year: 2024
  • CPU: Intel Core i9-13900HX
  • GPU: NVIDIA GeForce RTX 4070
  • Display: 16" WQXGA (2560×1600), 165Hz, 3ms
  • Storage: 1TB SSD
  • Original RAM: 16GB DDR5 5600MHz (2×8GB)
  • BIOS Version: latest version

I upgraded to Kingston FURY Impact 64GB kit (2×32GB, 5600MHz, CL40) and now the laptop does not boot — only a black screen.

I tried:

  • Both sticks installed → black screen
  • One stick (32GB) installed alone → black screen
  • Reinstalled old RAM → works fine

My questions:

  • Does the PHN16-71 support 2×32GB = 64GB DDR5 RAM?
  • Is Kingston FURY Impact compatible, or should I try another brand/model?
  • Should I instead downgrade to 32GB total (2×16GB) from the same Kingston series?
  • Is Kingston FURY Impact compatible, or should I try another brand/model?

Thank you for any help or official specs confirmation.

[Edited the thread to add model name to the title]

Best Answer

  • Jack22
    Jack22 ACE Posts: 4,670 Pathfinder
    Answer ✓

    @Riverutz

    Below is the RAM upgrade spec:

    image.png image.png

    Acer recommended RAM brands:

    image.png
    Click on 'Yes' if the comment answers your question!

Answers

  • Jack22
    Jack22 ACE Posts: 4,670 Pathfinder
    Answer ✓

    @Riverutz

    Below is the RAM upgrade spec:

    image.png image.png

    Acer recommended RAM brands:

    image.png
    Click on 'Yes' if the comment answers your question!
  • Riverutz
    Riverutz Member Posts: 5

    Tinkerer

    When I originally ordered the Kingston Fury kit, I also ordered a Crucial 32GB DDR5 5600MHz CL46 1.1V kit (2×16GB), but it was out of stock at the time. It arrived today, and I tested it — same issue: black screen, no boot, even with just one stick installed.

    I noticed that the official RAM support list only mentions DDR5 4800MHz, but my stock RAM is 5600MHz (SK Hynix 2×8GB) and works perfectly.

    So now I'm wondering:

    • If my laptop shipped with 5600MHz RAM, why does Crucial 5600MHz not work?
    • Is this a case of SPD/timing incompatibility, even if the voltage and speed match?
    • Should I stick strictly to 4800MHz kits, or only use SK Hynix/Samsung OEM-grade modules?

    Thanks again to everyone helping out — appreciate the insights.

  • Riverutz
    Riverutz Member Posts: 5

    Tinkerer

    I found these, will they work ? They are Micron 2x16gb 5600mhz

    image (3).jpg