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NVIDIA GeForce Hotfix Driver 617.70: What It Fixes, How to Install, Verify and Roll Back (Oct 2026)

How-to for NVIDIA GeForce Hotfix 617.70 (15 Oct 2026): the 320 FPS G-SYNC Pulsar cap and 360Hz QHD black-flash fixes, install and clean-install options, version check, rollback, and the Prefer Maximum Performance workaround.

T Terapep ·

TL;DR: NVIDIA's GeForce Hotfix Driver 617.70 (15 Oct 2026) fixes two specific 360Hz display bugs: a ~320 FPS cap on 360Hz G-SYNC Pulsar monitors (issue 6408986) and occasional black flashes on QHD 360Hz monitors (issue 4846825). The black-flash fix is only partial, so NVIDIA suggests setting Power management mode to Prefer maximum performance if flashes persist. It is an optional hotfix, built on the 617.42 WHQL driver. If you don't have these symptoms, you don't need it.

What 617.70 fixes

Per the NVIDIA changelog as quoted by TweakTown, Guru3D and MajorGeeks, the hotfix lists two fixes:

  • QHD monitor at 360Hz may have an occasional black flash during gameplay (4846825).
  • On a 360Hz G-SYNC Pulsar monitor, FPS may drop to 320 FPS (6408986). NTCompatible adds that users also saw extra input latency while the cap applied.

Two caveats from the same coverage:

  • NVIDIA says 617.70 fixes some, not all cases of the black flash and is still investigating the rest, with no date given.
  • A separate bug, G-SYNC / G-SYNC Pulsar becoming unavailable after the monitor sleeps, is not fixed. NVIDIA has reportedly reproduced it but has not given a release date.

Reports (VideoCardz, NTCompatible) describe the black-flash problem as affecting RTX 30 and RTX 40 series GPUs in earlier user reports. NVIDIA's own wording, as quoted, doesn't restrict the fix to those cards, so check your own symptoms rather than your GPU generation.

Is it WHQL? What "hotfix" means here

The hotfix is based on the GeForce 617.42 WHQL Game Ready driver, but 617.70 itself is a hotfix. TweakTown calls it a beta release and says its fixes are expected to appear in the next official Game Ready driver; NTCompatible says hotfixes use a different signing/attestation path than full WHQL releases. I could not load NVIDIA's own changelog page (it didn't render for me), so I can't quote NVIDIA directly on the certification status. Treat 617.70 as a non-WHQL optional hotfix, and treat that as a reasonable reading rather than an NVIDIA-confirmed statement.

Should you install it?

Install it if you have a 360Hz G-SYNC Pulsar monitor stuck near 320 FPS, or a 360Hz QHD monitor with random black flashes. Everyone else can stay on 617.42 WHQL and wait for the next mainline driver, which is also the position VideoCardz and NTCompatible take. NTCompatible also warns that kernel-level anti-cheat can be slow to accept a new hotfix, so a game that refuses to launch after installing is a reason to roll back. That is a single outlet's claim, which I haven't verified.

Download and install

  1. Get the file from NVIDIA's servers. It is a separate download for 64-bit Windows 10 and 11, a DCH driver for desktop and notebook GPUs. The file name reported by NTCompatible and a Guru3D forum post is 617.70-desktop-notebook-win10-win11-64bit-international-dch.hf.exe on international-gfe.download.nvidia.com. Guru3D and MajorGeeks mirror it, but the NVIDIA-hosted link is the one to prefer.
  2. Don't expect it in the NVIDIA app. NTCompatible says hotfixes can't be installed through the NVIDIA app or GeForce Experience, and that the app may keep showing your last WHQL driver date afterwards.
  3. Run the installer. Choose Custom installation if you want the option below.
  4. Clean install (optional). In the custom installer screen, NVIDIA's installer has a "Perform a clean installation" checkbox that resets driver settings. This is general NVIDIA installer behaviour, not something the hotfix notes call out. Note that it can reset per-game profiles and custom settings, so write down any you care about.
  5. Reboot.

File size reports differ: Guru3D and NTCompatible say about 634 MB, MajorGeeks says 944 MB. I couldn't resolve this, so don't rely on size to judge the download.

Verify the version

  • Right-click the desktop, open NVIDIA Control Panel, then System Information (bottom-left). The driver version should read 617.70.
  • Alternatively, open Device Manager, expand Display adapters, open your GPU's Properties and look at the Driver tab. Windows may show the version in its own longer format, so this is a less direct check than the Control Panel.

Note that these are standard Windows and NVIDIA Control Panel locations, not steps from NVIDIA's hotfix notes.

Apply the "Prefer maximum performance" workaround

If you still see black flashes after installing:

  1. Open NVIDIA Control Panel, then Manage 3D settings.
  2. Under Global Settings (or a specific game under Program Settings), set Power management mode to Prefer maximum performance.
  3. Click Apply and restart your PC. VideoCardz says a restart is required.

NVIDIA recommends this as a workaround for the remaining black flashes. The tradeoff is not specified by NVIDIA: TweakTown says no power or temperature tradeoffs are stated, while NTCompatible says it will use more power at idle and run slightly warmer. That is NTCompatible's reasoning, not an NVIDIA figure. Note the setting is not stated to help the sleep and wake G-SYNC bug or the 320 FPS cap.

Roll back to your previous driver

Use whichever of these fits:

  1. Reinstall the previous driver. Download the earlier driver (for example 617.42 WHQL) from NVIDIA and install it over 617.70, optionally with the clean install checkbox.
  2. Uninstall, then reinstall. In Windows Settings > Apps > Installed apps, remove the NVIDIA Graphics Driver, reboot, and install the version you want.
  3. Display Driver Uninstaller (DDU). NTCompatible recommends a clean rollback with DDU if a game won't launch after the hotfix. DDU is a third-party tool; get it only from its official source and use it in Safe Mode as its own instructions say.

If a previous driver version is stored on your PC, Device Manager > GPU Properties > Driver > Roll Back Driver may also be available. It is often greyed out after an install that replaces the old driver, so don't count on it.

What I couldn't verify

  • NVIDIA's own changelog page didn't render for me, so the fix list and workaround text come from TweakTown, VideoCardz, Guru3D, NTCompatible and PCCentral quoting NVIDIA. They agree with each other.
  • The exact WHQL status of 617.70 and the download size (see above).
  • Whether the hotfix helps every 360Hz monitor. NVIDIA itself says only some black-flash cases are fixed.

Related on Terapep

Sources

#nvidia#geforce#hotfix-driver#g-sync-pulsar#360hz#driver-rollback#how-to#2026
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