Valve invited developers to a Friday livestream to dig into Steam Deck hardware and software. The $400 portable PC ships with a custom AMD APU and a Linux-based OS. The Verge reported highlights from the event, including the official name of the chip: Aerith.
Aerith is a Zen 2 plus RDNA 2 hybrid. The chip runs between 4 and 15 watts depending on workload. Developers walked away with optimization tactics for battery life, performance and docked play.
The short version
- The Steam Deck chip is officially called Aerith, a custom AMD APU.
- Aerith pairs 4 Zen 2 cores with 8 RDNA 2 compute units and 16GB of LPDDR5 memory.
- Performance targets 720p and 800p resolution on the built-in screen.
- Valve will support AMD's FSR upscaling natively at the OS level via a future update.
- The optional dock supports dual 4K displays at 60Hz via Display Stream Compression.
- Developers can ship lower-fidelity texture packs to save bandwidth and storage.
What the chip can do
The Aerith APU contains a 4-core, 8-thread Zen 2 CPU clocked 2.4 to 3.5 GHz, and 8 RDNA 2 compute units clocked 1 to 1.6 GHz. Raw compute is around 1.6 teraflops. Memory is 16GB of unified LPDDR5 at 88 GB/s bandwidth, with up to 8GB addressable by the GPU.
Valve's Yazan Aldehayyat told developers that frame rates are designed to hold steady over long sessions. He said the early seconds of gameplay should match what players see after hours, and that plugged-in play should not throttle. That is unusual for a small-form-factor PC and matters for any title that relies on a stable framerate.
In a Florida July scenario, he admitted, you may run out of thermal headspace. Even then, Valve said it would rather accelerate downloads and transfers than gameplay frame rates. That is a notable design choice and worth watching on early review units.
How developers should tune games
Valve's recommendations include doing several things to get the most out of the Deck without killing battery life. Cap frame rates. Lower texture fidelity on the Steam side. Avoid pressing the GPU too hard if you want longer play sessions.
Lowering frame rate has a huge effect. Cap Portal 2 at 30 FPS and you get 5 to 6 hours of battery instead of 4 hours. That is a free win for indie devs shipping to the Deck.
Texture pack switching is the second big lever. Developers can upload lighter texture variants to the Steam store. The Deck downloads the lighter version first, improving install times and storage. That mirrors Microsoft's Smart Delivery on Xbox. Valve is betting developers will use it.
Docking, displays and FSR
The Deck ships with a 45W USB-C charger that supports pass-through power. While gaming, the system can top up the battery and still feed up to 7.5W to connected accessories over the same port. The optional dock adds Gigabit Ethernet and dual 4K display output at 60Hz via Display Stream Compression. If you halve the screen bandwidth, you also unlock USB 3 Gen 2.
FidelityFX Super Resolution support is real. AMD confirmed at the stream that the Deck will support FSR in games that ship with it, and will natively support FSR at the OS level in a future update. That gives developers a built-in upscaling path for docked play.
There is no USB 4 or Thunderbolt. Wi-Fi is 802.11ac (Wi-Fi 5), not Wi-Fi 6 or 6E. Valve said it optimized for reliability over speed in congested networks. That is a trade-off worth flagging for anyone planning to stream high-bitrate games over Wi-Fi.
Our analysis
The Deck is the first credible shot at a Switch-style form factor for PC games. The biggest constraint is battery and thermals, not raw GPU power. Valve is making developers do the optimization work that hardware constraints demand.
Watch for two things. First, whether early Deck review units hit Valve's battery claims under real-world load. Second, whether AMD's Vulkan Dynamic Rendering support lands in time. That could change how the Deck handles dynamic resolution. The Verge story ran long and was cut off, so expect more details to emerge.
For developers, the message is clear. Cap your frame rate, ship a lighter texture pack, and use FSR where you can. The Deck rewards restraint.
Say you are porting an indie game to the Deck
Imagine you have a 2D pixel art game with high-resolution texture options for 4K displays. You want to ship on Steam but optimize for the Deck.
Use the new texture pipeline. Ship a 720p-optimized texture pack to the Steam store. Your install size drops, your download time drops, and the Deck runs cool. Keep the 4K textures available for desktops. The player gets the right assets for their hardware without you maintaining two SKUs.
For frame rate, cap at 60 FPS on the Deck. Going higher burns battery without a visible payoff on a 7-inch screen. If your engine supports FSR, enable it for docked mode. That buys you extra headroom for the upscaled image to look good on a TV.
Bottom line
The Deck is a real portable PC, not a Switch clone. Developers who treat it as a constrained PC and tune for it will get the best out of it. Everyone else will have a short battery and a hot chip.
Frequently asked questions
What is the official name of the Steam Deck chip?
The chip is called Aerith, a custom AMD APU. It pairs Zen 2 CPU cores with RDNA 2 graphics.
What resolution does the Steam Deck target?
The built-in screen runs at 720p and 800p. The dock can drive dual 4K displays at 60Hz via Display Stream Compression.
Does the Steam Deck support FSR?
Yes. The Deck supports AMD's FidelityFX Super Resolution in games that ship with it, and will support FSR natively at the OS level in a future update.
How long does the battery last?
Valve says Portal 2 lasts about 4 hours at default settings, and 5 to 6 hours when capped at 30 FPS. Real-world battery life varies by game.
Can the Steam Deck charge while playing?
Yes. The 45W USB-C charger supports pass-through power, so the system can run games and top up the battery at the same time.