ROG Ally vs ROG Ally X: Which Should You Buy in 2026?

ASUS sells two ROG Ally models: the original ROG Ally and the ROG Ally X. The Ally X costs more but fixes the original’s biggest problems. If you’re deciding between them, this comparison covers what actually changed, spec by spec, and whether the upgrade is worth the price difference.

Specs Comparison

The Key Difference: Battery Life

The original ROG Ally had a 40Wh battery, critically small for a device as power-hungry as the Z1 Extreme chip demands. Real-world gaming sessions lasted 1.5-2 hours under load. That’s not enough for most travel use cases.

The Ally X doubled it to 80Wh. Real-world sessions now run 2.5-4 hours under gaming load, usable for a commute or a flight. This single change is the main reason the Ally X exists and the main reason to choose it over the original.

RAM: 24GB vs 16GB, and It’s Faster Too

The Ally X ships with 24GB of LPDDR5X-7500 RAM vs 16GB of LPDDR5-6400 in the original. That’s not just more memory, it’s meaningfully faster memory, which matters on an APU that shares system RAM with the integrated GPU. The extra 8GB matters in two scenarios: running Windows with multiple apps open alongside a game, and future-proofing for games that increasingly recommend 16GB+ RAM. For current gaming in 2026, 16GB handles most titles, the upgrade is useful rather than essential, but the faster memory speed gives the Ally X a small but real frame rate edge in GPU-bound titles even at identical settings.

Storage: 1TB vs 512GB, and Easier to Upgrade

The Ally X ships with 1TB, the original with 512GB. Modern AAA games average 50-100GB each. 512GB fills up with 5 to 10 large games. 1TB gives more headroom. Both models support microSD expansion, so the storage difference is manageable, but there’s a second factor most buyers miss: the original Ally uses a cramped M.2 2230 drive, the same small form factor used in the Steam Deck and Xbox Series S, which is harder to find in larger capacities and pricier per gigabyte. The Ally X moved to a standard M.2 2280 slot, the same size used in most laptops, which means cheap, widely available replacement drives if you ever want to upgrade past 1TB yourself.

Ports and Cooling: The Quiet Upgrades

The original Ally has a single USB-C port that doubles as the proprietary ROG XG Mobile Interface for an external GPU dock, meaning you can’t charge and use a standard USB-C accessory on that port at the same time without a hub. The Ally X splits this into two ports: one USB4-class port that still supports XG Mobile and external displays, and a second plain USB-C 3.2 Gen 2 port for accessories or charging. That alone fixes a real annoyance with the original.

Cooling also changed. The original Ally uses a single fan; the Ally X moved to a dual-fan design, which keeps the chip cooler under sustained load and reduces the thermal throttling that could shave frames off long gaming sessions on the original, particularly in the highest 30W performance mode.

Grip and Ergonomics

The bigger battery and dual fans add up to a heavier, chunkier device. At 678g, the Ally X is about 70g heavier than the original’s roughly 608g, and the grips are noticeably deeper and more rounded to fit the extra internals. Most people find the Ally X more comfortable for long sessions despite the added weight, the deeper grip distributes weight better in your hands, similar to how a slightly heavier controller with a good grip shape can feel better than a lighter one that digs into your palms. If you have smaller hands, try holding both in person before buying, the size difference is noticeable.

What Didn’t Change

Same processor (Z1 Extreme), same display (7″ 120Hz IPS), same operating system (Windows 11), same game compatibility. Performance in games at matched settings is nearly identical between the two models, the Ally X’s advantage shows up mainly in sustained sessions where the better cooling and faster RAM prevent throttling, not in short benchmark runs. If you’re choosing between them purely for peak gaming performance, they’re close to the same device.

Should You Buy the Original or the X?

Buy the ROG Ally X if:

• Battery life is important, the 40Wh original is genuinely limiting
• You want 1TB storage and 24GB RAM without adding accessories
• You want an easier storage upgrade path later (standard M.2 2280 slot)
• You’re buying new at market price (~$799 vs ~$499-$599)

Buy the original ROG Ally if:

• You find it at a significant discount ($300-$350 range used/refurbished)
• You primarily play docked or near a charger where battery life is irrelevant
• Budget is the limiting factor

At $200 off, the original Ally is a reasonable value. At full price, the Ally X is worth the premium, the battery improvement alone justifies it for portable gaming, and the better cooling and upgrade path add up over a few years of ownership.

Where to Buy

👉 ROG Ally X on Amazon

👉 ROG Ally (original) on Amazon

Common Questions

Can you upgrade the original Ally’s battery to match the Ally X? No. The 80Wh battery is physically larger and built into the Ally X’s redesigned chassis, it doesn’t fit the original’s shell. There’s no official or safe aftermarket swap.

Does the Ally X play games the original can’t? No. Same processor means the same game compatibility. The Ally X just sustains performance longer and handles heavier multitasking better thanks to the extra RAM.

Is the Ally X worth it if I mostly play indie or 2D games? Less so. Lighter games don’t stress the battery or thermals the way AAA titles do, so the original’s weaknesses matter less. In that case the price gap is harder to justify.

Bottom Line

Choose the ROG Ally X. The original’s 40Wh battery is a serious limitation for portable gaming, and the Ally X’s 80Wh battery fixes it while adding more RAM, more and easier-to-upgrade storage, better cooling, and more flexible ports. If you find the original at a steep discount and primarily game near a charger, that changes the calculus, but for most buyers, the X is the right version.