High DPC Latency on Predator PHN16-73 (Ultra 9 275HX + RTX 5070 Ti) Despite Latest Drivers

StarDestroyer16

Hello,

I recently purchased the Acer Predator Neo 16 AI PHN16-73-934N with Intel Ultra 9 275HX and RTX 5070 Ti. While gaming or running real-time applications, the system experiences noticeable stutters.

System Detail HWiNFO.txt

To investigate, I ran LatencyMon for extended sessions. The results consistently show:

• High DPC latency from nvlddmkm.sys (NVIDIA GPU driver) and ACPI.sys.
• Latency spikes up to 1600–3200 µs, well above safe thresholds for real-time workloads.
• LatencyMon conclusion: “Your system appears to be having trouble handling real-time audio and other tasks… one problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.”
  
  Latancymon Report.txt

This suggests the issue is not only NVIDIA drivers, but also firmware/BIOS power management and ACPI handling.

I have already installed all the latest drivers directly from Acer’s support page, including:

• NVIDIA RTX 5070 Ti driver v32.0.15.7276 (1.26 GB)
• Intel chipset, Serial I/O, DPTF, ISST, ME, LAN, WLAN, Bluetooth, Realtek Audio, and others
• BIOS is currently at V1.07 (09/12/2025) — the latest available.

Request:
Can Acer confirm if upcoming BIOS/EC firmware updates will address DPC latency and ACPI/interrupt handling on the PHN16-73? This issue impacts overall responsiveness and causes stutter even with fully updated drivers.

Thank you.

StevenGen

With your Acer Predator Neo 16 AI PHN16-73-934N, I suggest that you install the NVidia App as the latest Nvidia Game Ready driver for the Notebook RTX5070Ti gpu is the version 581.29 and play all supported games through this specialist app for the RTX5070Ti gpu best settings, as Nvidia has gone to allot of trouble to make the Nvidia app for gaming. Make sure that your Win-11 24H2 version is fully update to the last OS build: 26100.6584.

Also upgrade the M.2 SSD to the quickest Gen 4 x4 M.2 SSD drive like the Samsung 990 Pro + Heatsink and the DDR5-6400MT/s type memory to at least 64GB 2x 32GB (see below) but preferably 128GB 2x 64GB DDR5 6400 MT/s as these laptops work allot better for gaming and real time applications. Acer recommends the Hynix type memory module at 32GB below, but this laptop is also released in 128GB ram, so try the modules at 64GB 2x 32GB Hynix ram below or the Crucial 128GB kit 2x 64GB below, as they will work 100%.

• Memory HYNIX SO-DIMM DDRV 6400 32GBHMCG88AHBVA LF+HF 1anm A-die CP with CKD
• Crucial 128GB Kit (64GBx2) DDR5-6400 CSODIMM - memory module #: CT2K64G64C52CS5

Also, keep your laptop at default settings always and DO NOT install apps that will overclock/undervolt this laptop, as this laptop does NOT need these settings that some gamers use, as doing all the above should fix the problems with gaming or running real-time applications that you are having. Good luck and hope this helps you out.

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