Compare Anbernic RG556 (223×105×15 mm, 5.48" 16:9) vs ASUS ROG Ally X (280.2×114×36.9 mm, 7" 16:9) side-by-side at true 1:1 millimeter scale.
Silhouettes and screens to true relative scale (mm). Inner rectangle represents the physical screen.
Anbernic RG556
Panel 16:9 with native resolution 1920x1080.
ASUS ROG Ally X
Panel 16:9 with native resolution 1920x1080.
Physical Dimensions & Thickness: The Anbernic RG556 has a horizontal bar chassis measuring 223 × 105 × 15 mm, while the ASUS ROG Ally X uses a horizontal bar chassis measuring 280.2 × 114 × 36.9 mm. In width, the Anbernic RG556 is 57.2 mm (20.4%) narrower than the ASUS ROG Ally X. In height, the Anbernic RG556 is 9 mm (7.9%) shorter than the ASUS ROG Ally X. In chassis thickness (depth), the Anbernic RG556 is 21.9 mm (59.3%) slimmer than the ASUS ROG Ally X (15 mm vs 36.9 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the Anbernic RG556 occupies 23,415 mm² (234.2 cm²), compared to 31,943 mm² (319.4 cm²) for the ASUS ROG Ally X—a footprint difference of 8,528 mm² (26.7%). On the scale, the Anbernic RG556 weighs 331g versus 678g for the ASUS ROG Ally X, representing a 347g (51.2%) weight difference (Anbernic RG556 is lighter).
4:3 vs 16:9 Effective Viewable Screen Size: For classic 4:3 retro games (PS1, SNES, N64, Dreamcast), the Anbernic RG556's 5.48" (16:9) panel yields a 4.48" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)), while the ASUS ROG Ally X's 7" (16:9) panel yields a 5.72" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)). This gives the ASUS ROG Ally X a 1.24" larger active 4:3 diagonal (63.2% more active display area). For 16:9 widescreen content (PSP, Switch, streaming), the Anbernic RG556 delivers a 5.48" effective diagonal (100% screen usage) versus 7" (100% screen usage) on the ASUS ROG Ally X, making the ASUS ROG Ally X larger by 1.52" (+63.2% active 16:9 area).
| Specification | Anbernic RG556 | ASUS ROG Ally X | Difference / Comparison |
|---|---|---|---|
| Dimensions (W × H × D) | 223 × 105 × 15 mm | 280.2 × 114 × 36.9 mm | Anbernic RG556 is 70.2% smaller by volume |
| Width | 223 mm | 280.2 mm | 57.2 mm (20.4% vs ROG Ally X) |
| Height | 105 mm | 114 mm | 9 mm (7.9% vs ROG Ally X) |
| Thickness (Depth) | 15 mm | 36.9 mm | 21.9 mm (59.3% vs ROG Ally X) |
| Footprint Area (W × H) | 23,415 mm² (234.2 cm²) | 31,943 mm² (319.4 cm²) | 8,528 mm² (26.7% diff) |
| Chassis Volume | 351.2 cm³ | 1178.7 cm³ | 827.5 cm³ (70.2% diff) |
| Weight | 331 g | 678 g | 347 g (51.2% diff) |
| Form Factor | Horizontal Bar | Horizontal Bar | Both Horizontal Bar |
| Native Screen Diagonal | 5.48" | 7" | 1.52" (27.7% larger on ROG Ally X) |
| Native Aspect Ratio | 16:9 | 16:9 | Identical 16:9 ratio |
| Display Technology | AMOLED | IPS | AMOLED vs IPS |
| Native Resolution & Density | 1920x1080 (402 PPI) | 1920x1080 (315 PPI) | 87 PPI sharper on RG556 |
| Effective 4:3 Screen Size (PS1, SNES, N64) | 4.48" (75% area, pillarbox) | 5.72" (75% area, pillarbox) | +1.24" (+63.2% area) on ROG Ally X |
| Effective 16:9 Screen Size (PSP, Streaming) | 5.48" (100% native, no bars) | 7" (100% native, no bars) | +1.52" (+63.2% area) on ROG Ally X |
| Effective 3:2 Screen Size (Game Boy Advance) | 4.84" (84% area, pillarbox) | 6.19" (84% area, pillarbox) | +1.35" (+63.2% area) on ROG Ally X |
| Processor (SoC / CPU) | UNISOC Tiger T820 | AMD Ryzen Z1 Extreme | Different architecture |
| Memory (RAM) | 8 GB LPDDR4X | 24 GB LPDDR5X (7500 MT/s) | 8 GB LPDDR4X vs 24 GB LPDDR5X (7500 MT/s) |
| Battery Capacity | 5,500 mAh | 10,390 mAh | 4,890 mAh larger on ROG Ally X |
| Operating System | Android 13 | Windows 11 | Android 13 vs Windows 11 |
The Anbernic RG556 measures 223 × 105 × 15 mm (footprint: 23,415 mm² / 234.2 cm²), whereas the ASUS ROG Ally X measures 280.2 × 114 × 36.9 mm (footprint: 31,943 mm² / 319.4 cm²). Compared to the ASUS ROG Ally X, the Anbernic RG556 is 57.2 mm (20.4%) narrower, 9 mm (7.9%) shorter, 21.9 mm (59.3%) slimmer, and 8,528 mm² (26.7%) smaller in footprint area. In weight, the Anbernic RG556 is 347g (51.2%) lighter (331g vs 678g).
The ASUS ROG Ally X delivers a larger active 4:3 image by 1.24" diagonal (63.2% more active display area) than the Anbernic RG556. Specifically, the Anbernic RG556 has a 5.48" 16:9 AMOLED screen (1920x1080) that yields a 4.48" effective 4:3 diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)). The ASUS ROG Ally X has a 7" 16:9 IPS screen (1920x1080) that yields a 5.72" effective 4:3 diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)).
For 16:9 widescreen gaming (PSP, Switch, and game streaming), the ASUS ROG Ally X provides a larger viewable image at 7" effective diagonal compared to 5.48" on the Anbernic RG556 (+1.52", or 63.2% more active widescreen area). On 16:9 content, the Anbernic RG556 operates at 100% full screen without black bars (native 16:9), while the ASUS ROG Ally X operates at 100% full screen without black bars (native 16:9).
Yes, the Anbernic RG556 is more compact and pocketable than the ASUS ROG Ally X, with a smaller overall chassis volume (351.2 cm³ vs 1178.7 cm³). The Anbernic RG556 uses a horizontal bar form factor (223 mm wide × 15 mm thick, 331g), whereas the ASUS ROG Ally X uses a horizontal bar form factor (280.2 mm wide × 36.9 mm thick, 678g). Overall, the Anbernic RG556 is easier to carry in a pocket due to its slimmer 15 mm profile and smaller physical footprint.
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