How to Push the R36S to the Max for Heavy PSP Games (Ghost of Sparta)

This is the September 2026 “push it to the max” recipe for heavy 3D PSP on an RK3326 handheld — God of War: Ghost of Sparta as the torture test. After PPSSPP 2021, skip-buffer, a 20 FPS cap, and clocks that actually stay high, our overlay read 15/19 at ~101% speed: full logical speed, frameskip doing the choppy part. It will not become 60 FPS. It becomes playable.

What “max” actually means

Stock Ghost of Sparta on current ArkOS PPSSPP sat at 10–13 FPS and slow-mo on the Plus we opened. After this stack, the overlay was 15 drawn / 19 logical at ~101% speed. Combat moves at the game’s intended pace; you see every other frame because frameskip is 2. Hold R2 to unthrottle menus and cutscenes.

Use a dump you own. We do not link ISOs. For which PSP titles are actually full-speed on this chip, start with the PSP tier list. Ghost of Sparta is Tier 3 — the honest “heavy 3D” bucket.

The four things that were actually wrong

1. Wrong PPSSPP. Newest standalone is fine for light games. Heavy 3D on this Mali wants standalone-2021.
2. Compat silently undid skip-buffer. Setting Skip Buffer Effects on is not enough. Game compatibility was forcing it off until we set IgnoreCompatSettings = SkipBufferEffects.
3. 70°C thermal trip. God of War walks ~90–105°C. Stock IPA trips at 70°C, so the chip sits at ~1.01 GHz / 400 MHz GPU while the UI still says “performance”.
4. Plus clock cap (Plus only). The 720×720 DTB never listed 1.51 GHz. And even after grafting it, ArkOS perfmax was hardcoded to 1296 MHz on every game launch — so the extra OPP never got used.

If you only change PPSSPP settings and skip heat + clocks, Ghost of Sparta still feels like it is running underwater. If you only raise clocks and stay on new PPSSPP with skip-buffer off, you still get 10–13 FPS.

What you need

• Handheld on the same 2.4 GHz WiFi as your PC (5 GHz dongles on these boards often do nothing)
• Windows / Mac / Linux with ssh (already in Windows Terminal)
• ISO on the PSP folder — how to add PSP games. Prefer ISO over CSO on heavy 3D.
• Game not running while you edit files (PPSSPP copies ini back on exit)

1. Turn Remote Services on (and keep it on)

EmulationStation → Options → Enable Remote Services. Note the IP under Network Info.

That starts SSH (port 22), Filebrowser (port 80, title “ArkOS Browser”), and Samba. If SSH later says connection refused, the handheld slept or Remote Services stopped — run the option again.

Default SSH login is ark / ark unless you changed it:

ssh ark@192.168.1.43

2. Switch the game to PPSSPP 2021

Highlight the game → Select → Edit this game's metadata → Emulator standalone-2021 → save.

On ArkOS the EmulationStation system for this card is often named ppsspp (folder still /roms2/psp/), not psp. After launch you want a process like /opt/ppsspp-2021/PPSSPPSDL:

pgrep -af PPSSPPSDL

You can also stamp the default for the whole system in ~/.emulationstation/es_settings.cfg:

<string name="ppsspp.emulator" value="standalone-2021" />

Restart EmulationStation if the picker looks stale.

3. The PPSSPP file that actually moves the needle

Persistent files sit next to the ROMs:

• SD1: /roms/psp/ppsspp/PSP/SYSTEM/ppsspp.ini and ppsspp.ini.sdl
• SD2: /roms2/psp/ppsspp/PSP/SYSTEM/ppsspp.ini and ppsspp.ini.sdl

Patch both files. The line most people miss is IgnoreCompatSettings — without it, Ghost of Sparta’s compatibility profile turns Skip Buffer Effects back off.

Paste this after SSH (change /roms2/ to /roms/ if the ISO is on SD1). It only rewrites keys that already exist; it adds IgnoreCompatSettings if missing:

python3 - << 'PY'
import os, re
paths = [
  "/roms2/psp/ppsspp/PSP/SYSTEM/ppsspp.ini",
  "/roms2/psp/ppsspp/PSP/SYSTEM/ppsspp.ini.sdl",
]
u = {
  "FrameSkip": "2", "AutoFrameSkip": "True", "ForceMaxEmulatedFPS": "20",
  "InternalResolution": "1", "SkipBufferEffects": "True",
  "IgnoreCompatSettings": "SkipBufferEffects",
  "BloomHack": "3", "DisableSlowFramebufEffects": "True",
  "DisableStencilTest": "True", "SkipGPUReadbackMode": "1",
  "MemBlockTransferGPU": "False", "CPUSpeed": "222",
  "IOTimingMethod": "0", "VSyncInterval": "False",
  "RenderDuplicateFrames": "True", "HardwareTransform": "True",
  "SoftwareSkinning": "True", "ShowFPSCounter": "3",
  "SplineBezierQuality": "0", "HardwareTessellation": "False",
}
for p in paths:
  if not os.path.exists(p):
    print("skip missing", p); continue
  text = open(p, errors="replace").read()
  for k, v in u.items():
    pat = r"(?m)^" + re.escape(k) + r" = .*$"
    line = "%s = %s" % (k, v)
    if re.search(pat, text):
      text = re.sub(pat, line, text)
    else:
      text += "\n" + line + "\n"
  open(p, "w").write(text)
  print("patched", p)
PY

Leave the overlay on for one session. Target is ~20 logical FPS at ~100% speed, not a locked 30. Turn the counter off later in the PPSSPP menu (L2 on ArkOS). If skip-buffer makes water unreadable, turn it off in-menu — you will lose FPS; that is the trade.

4. Fast-forward on R2

Stock mappings often put Unthrottle on a keyboard key. PSP games do not use R2. In /roms2/psp/ppsspp/PSP/SYSTEM/controls.ini (or the /roms/psp/... twin):

Unthrottle = 1-61,10-195,10-105

Hold R2 for menus, boats, and cutscenes. It will not 2× a heavy fight.

5. Confirm you are not thermally clipped

With Ghost of Sparta running, SSH a second session:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
cat /sys/devices/system/cpu/cpufreq/policy0/scaling_available_frequencies
cat /sys/devices/platform/ff400000.gpu/devfreq/ff400000.gpu/cur_freq
awk '{print $1/1000 " C"}' /sys/class/thermal/thermal_zone0/temp
cat /sys/class/thermal/thermal_zone0/trip_point_0_temp

GPU max on both trees we measured is already 520 MHz. RAM is 786 MHz. There is no extra GPU overclock hiding in a menu.

Workshop thermal unlock (heat is real)

Stock IPA trip0 is 70°C. Ghost of Sparta sits above that within minutes. In the workshop we persist trip0 105°C / trip1 110°C and leave critical shutdown at 115°C. A conservative home test (does not survive reboot unless you also edit /etc/rc.local) is 90°C:

echo 90000 | sudo tee /sys/class/thermal/thermal_zone0/trip_point_0_temp
echo 105000 | sudo tee /sys/class/thermal/thermal_zone0/trip_point_1_temp
echo 0 | sudo tee /sys/class/thermal/cooling_device0/cur_state

To survive reboot, the same echoes belong in /etc/rc.local (use #!/bin/sh, not sh -e, and || true on any optional sysfs writes) and in /usr/local/bin/perfmax so every game launch re-applies them. Backup those two files first. If that sounds like more than you want to own, book the video call — we will show a unit that already has it.

6. Plus-only: 1.51 GHz is missing from the device tree

Classic 3.5" ArkOS images we see already expose 1512 MHz. Plus boots rk3326-r36plus-linux.dtb so the square panel works — and that file simply omits the top CPU step. Same RK3326 silicon. Do not copy rg351mp-kernel.dtb over it or the screen goes wrong.

The graft, restore file, and the perfmax 1296 trap are written up in why the R36S Plus stops at 1.30 GHz. If you are not comfortable restoring a DTB from a PC card reader, skip that article’s workshop section and stay at 1.30 GHz — the PPSSPP 2021 + skip-buffer + 20 FPS cap still does most of the “playable” work.

What “good” looks like