Quick answer: In Digital Foundry's review, the $1,299 Acer Predator Atlas 8 with Intel's Arc G3 Extreme ran about 50-70% faster than the ROG Xbox Ally X at matched settings and 35W, but Windows 11 bugs and scattered driver updates held it back.

Digital Foundry's William Judd found Acer's $1,299 Predator Atlas 8 with Intel's Arc G3 Extreme, Intel's first handheld-specific chip, ran around 50 to 70 percent faster than the ROG Xbox Ally X at matched settings with both set to 35W. The Ally X was using FSR 4, which DF says often costs around 5 percent.
Judd tested five games with built-in benchmarks over about four days. In Turbo mode the Atlas 8 hit 84fps in F1 25 versus 52fps on the Xbox Ally X, 79fps versus 52fps in Forza Horizon 6, 93fps versus 54fps in Returnal and 101fps versus 62fps in Red Dead Redemption 2, all at 1080p with upscaling. Civilization 7's GPU test came in at 97fps versus 46fps. DF says that moves games that sit under 60fps on the Ally X into the 80s and 90s, which suits the Atlas 8's 8-inch 1920x1200 120Hz VRR screen.

Power modes are 25W Quiet, 30W Balanced and 35W Turbo, plus a manual setting up to 40W. On the downside, DF found the 810g Atlas 8 less comfortable than its rivals, with basic grips and buzzy rumble.
The bigger complaint was Windows 11. Judd describes a very long setup, driver updates spread across nearly half a dozen places, crashing apps and Steam games missing from the Xbox launcher, many of the same problems he saw on the Xbox Ally X. DF still calls the Atlas 8 a great handheld that's well worth considering.
Notebookcheck also rounded up ETA Prime's testing, where the Atlas 8 scored 6,607 in 3DMark Time Spy at 35W against 4,091 for the Xbox Ally X. The Atlas 8 costs $1,299.99 at Best Buy, the same as the Z2 Extreme-based ROG Xbox Ally X20. We covered the US launch and sold-out preorders and early Bazzite support last week.