Eidos Montreal has announced that the game they've been developing, Thief, will not come with support for AMD's Mantle API when it launches later this week. Instead, the title will initially only support DirectX, and a patch enabling Mantle will be made available during March.

The patch will also bring support for TrueAudio, making Thief the first game to utilize the dedicated DSP found on GCN 1.1-based graphics cards, such as the Radeon R9 290, R9 290X, R7 260 and R7 260X. TrueAudio shifts advanced audio processing from the CPU to the GPU's DSP, giving both better performance and more immersive audio experiences.

In a statement, Eidos Montreal said they're "confident this patch will ensure the best and fastest Thief experience for AMD Radeon customers". They go on to say "We're sorry we couldn't bring this to you sooner - although we will use this time to bring you the very best experience possible and will let you know when the patch is ready."

Back in November we heard that Eidos had partnered with AMD to make Thief a Mantle-supported title, as just one of several developers working on integrating Mantle into their upcoming games. Star Citizen and Sniper Elite 3 will also support Mantle upon their release, while AMD and EA DICE have already integrated Mantle into Battlefield 4.

Thief will launch on February 25 for Windows, Xbox One, PlayStation 4, Xbox 360 and PlayStation 3.