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SJGAM M21

3.5" 4:3 Display (640x480)

4:3 Native ● 640x480
Stock OS
Form Factor: Vertical Weight: 208 grams
aspect_ratio Simulate Letterboxing
GBA / PS1 Elite

M21

SJGAM · Released 2024 / 07

$50.00 MSRP
$40
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Chipset (SoC) "N909" (Allwinner H133)
Battery 3000 mAh
Aspect Ratio 4:3 Native
Dimensions ?

Emulation Performance Radar

Tested frame rates and compatibility across key retro systems

Hardware Tier: ⭐️⭐️⭐️⭐️
Game Boy Advance (GBA)
check_circle Perfect (60fps)
Integer 3x scaling available
PlayStation 1 (PS1)
check_circle Playable (60fps)
Enhanced resolution mode supported
Nintendo 64 (N64)
Select 80%
Mupen64Plus-Next core
PlayStation 2 (PS2)
Unplayable
NetherSX2 / AetherSX2

Full Technical Specifications

Manufacturer / Brand SJGAM
Screen Diagonal 3.5 Inches
Display Resolution 640x480
Aspect Ratio 4:3 Native
System Chipset (SoC) "N909" (Allwinner H133)
Battery Capacity 3000 mAh
Device Dimensions ?
Device Weight 208 grams
Stock Operating System Linux (EmuELEC)
Recommended CFW Stock OS

Frequently Asked Questions

Can the M21 play PS2 and GameCube games? expand_more

The SJGAM M21 is powered by the "N909" (Allwinner H133) processor. For PS2 and GameCube emulation, it is not powerful enough to run full-speed 3D titles. We recommend looking into Odin 2 or Retroid Pocket 4 Pro for flawless PS2.

What is the best custom firmware (CFW) for M21? expand_more

The community overwhelmingly recommends Stock OS. It drastically improves boot time, enables instant deep sleep, and provides cleaner RetroArch hotkey integrations.

Should I replace the stock MicroSD card that came in the box? expand_more

Yes, absolutely. Generic unbranded MicroSD cards included with budget handhelds frequently suffer corrupted save files within 2 to 4 weeks. Always flash your firmware onto a branded card from SanDisk, Samsung, or Kioxia.