Gears of War: E-Day borrows SSD space to stretch Xbox Series S memory

The developer behind Gears of War: E-Day has found more working memory inside Xbox Series S by parking idle data on the console's fast storage. The trick gives the cheaper Xbox extra headroom without changing its chips.

Series S ships with 10GB of GDDR6 RAM, the fast working memory that holds textures, geometry and everything else needed from one frame to the next. That pool has proved tight for teams building for both Xbox consoles. The Coalition's answer, detailed by Eurogamer, trades a couple of gigabytes of SSD space for about a gigabyte of usable system memory.

It works through prediction. Advanced heuristics, in effect smart rules that study which data gets touched and when, keep frequently used material in RAM and move idle material to the NVMe SSD, the console's very fast internal drive. When idle data is needed again, it is fetched back at speed.

The memory system was co-developed with Xbox's Advanced Technology Group. Its workings were laid out in a Digital Foundry feature on how E-Day handles the Series S limit, followed by an extended behind-the-scenes look filmed at The Coalition's offices and published on 2 October 2026. That second report describes joint graphics work by The Coalition and Epic for the game.

Gears of War: E-Day launches on Xbox Series X|S, PC and Steam, according to Xbox. The Xbox listing says the game is optimised for Xbox Series X|S, with support for 4K Ultra HD, HDR and 60 frames per second.

What makes this stand out is the trade. Storage is plentiful. Fast memory is not. For players with a Series S, the idea is simple: lend the game a little storage space and it can keep more of the active game world close at hand.

That matters because Series S and its bigger sibling, Series X, are asked to play the same games. Techniques that stretch the smaller console's memory make that job easier without asking players to understand the engineering underneath.