Guarana Download

Ryzen 7040/8040 laptops; Z1 Extreme and Z2 handhelds

Switch 2 emulation on AMD Radeon 780M

The 12-CU RDNA 3 GPU in Ryzen 7040 and 8040 laptops is also the GPU of the Ryzen Z1 Extreme (ROG Ally, ROG Ally X, Legion Go) and the Ryzen Z2. AMD handhelds are Guarana's next target; this GPU is untested so far.

Untested Nobody has reported it yet. Send a report.

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What we know

  • Untested. Send a report: yours would be the first.

Specs that matter for emulation

GPU architecture
RDNA 3
GPU size
12 compute units, up to 2.7 GHz (Ryzen 7 7840U, Ryzen Z1 Extreme)
Memory
Shares system RAM (DDR5 or LPDDR5X); the firmware reserves part of it as dedicated video memory
Power
Laptops: 15–30 W (U-series). Ryzen Z1 Extreme handhelds: 9–30 W. Ryzen Z2: 15–30 W
Found in
Ryzen 7 7840U/HS, 8840U/HS and similar laptops; ROG Ally, ROG Ally X and Legion Go (Z1 Extreme); Legion Go 2 base model (Ryzen Z2)
Driver
AMD Software: Adrenalin Edition (Windows)

From Intel, AMD and device makers' published specs. Power limits vary with model, firmware and mode.

Starting point for settings

Not tuned for this device: it's the setup from the tested Arc 140T laptop. Change one thing at a time and report what helps.

  1. Power

    Plug in and pick the device's highest performance mode. Put the mode and wattage in your report.

  2. Driver

    Use a current AMD graphics driver (AMD Software: Adrenalin Edition, or the package from your device maker) and report its version.

  3. Global-memory routing

    Add EDEN_NX2_GM=11 to nx2_switches.txt next to the emulator, or set it as an environment variable. It is the change behind the measured Arc 140T gain. If a game renders wrongly, remove it first and tell us.

  4. Frame generation

    In the graphics settings, turn on Enable Frame Generation and set Target Frame Rate to 60. Add EDEN_NX2_EXTRAPOLATE=1 for extrapolated frames (motion data is wired up for Ocarina of Time only). Report game fps, not the total with generated frames.

  5. Shaders

    The first visit to an area hitches while shaders compile. Judge smoothness on the second pass.

Notes for this device

  • Switch 2 games are written for an NVIDIA GPU, and AMD drivers expose emulation gaps differently. Upstream Lichii keeps notes on AMD GPUs, with the fixes so far and the open reports: read them before filing a bug.
  • When you compare frame rates, set the log filter to *:Error. Info-level logging costs CPU time in busy scenes (from the same notes).

Have one? Send a report

One report turns this page from a guess into data. Include:

  • Device, CPU, GPU and RAM
  • The full graphics driver version (on Intel, like 32.0.101.9175; on Linux, the Mesa version) and the OS
  • Plugged in or on battery, and the power mode or wattage
  • The emulator build, every setting you changed and every EDEN_NX2_* switch you set (or "none")
  • The game and the exact spot, docked or handheld mode, and a screenshot of the scene
  • Average fps and, if you can, p50 and p99 frame times, measured after the scene settled

Never attach keys, firmware, game files, saves, shader caches, or logs that show your user name or folder paths.

Open the device report form

Questions

Can the ROG Ally or Legion Go run Switch 2 games with Guarana?

Untested. Their Ryzen Z1 Extreme uses this 12-CU RDNA 3 GPU. AMD handhelds are the next target after Intel Arc, and a report from your device helps decide what gets fixed first.

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