ARM Immortalis-G715 flagship GPU scales up to 16 cores and supports hardware-accelerated ray tracing, will be available in smartphones early 2023
ARM made a series of announcements about new innovations coming to the ARMv9 architecture and the Mali lineup of GPUs under the Total Compute Solutions 2022 (TCS22) initiative. The company is now introducing a new flagship GPU christened Immortalis-G715. Immortalis-G715 brings several firsts to the table including support for hardware-accelerated ray tracing on mobile.
The Immortalis-G715 is distinct from ARM's new Mali-G715 GPU. Similar to the Mali, the Immortalis-G715 is also based on the Valhall architecture. The Immortalis-G715 can scale from 10 to 16 cores with configurable L2 cache from 512 KB to 2 MB. The L2 cache can be configured in two or four slices of 256K, 512K, or 1024K.
The GPU supports up to 16x MSAA, up to 4x4 Variable Rate Shading (VRS), Adaptive Scalable Texture Compression (ASTC), 4x4 ARM Frame Buffer Compression (AFBC), and ray tracing. API support includes OpenGL ES versions up to 3.2, Vulkan 1.3, and OpenGL 2.0 Full Profile.
Other improvements include a faster Command Stream Frontend, 3x peak triangle throughput, optimized LOD lookups in the Texture Mapper, and a new co-ordinate pre-processor unit for cubemap lookup. The Immortalis-G715 also brings forth the ARM Fixed Rate Compression (AFRC) that was first introduced in the Mali-G510 to save data bandwidth.
The Mali-G710 already supports software-based ray tracing. The Immortalis-G715 builds upon this by offering a dedicated ray tracing unit (RTU) in the shader core. ARM says that the RTU uses only 4% of the shader core area while delivering 300% more performance improvements in ray tracing.
ARM also said that it has made improvements to the Execution Engine with optimized fused multiply-add (FMA) instructions for increased power efficiency while also adding support for Matrix Multiply Instruction (MMI).
ARM claims that the Immortalis-G715 offers up to a 15% performance increase and 2x machine learning improvements thanks to MMI support for leading mobile gaming and graphics experiences. The company also claims a 15% improvement in energy efficiency.
Alongside the flagship Immortalis-G715, ARM also introduced the Mali-G715 and Mali-G615 GPUs for the premium upper-midrange segment. The Mali-G715 and Mali-G615 are also based on ARM's Valhall architecture and feature similar specifications as the Immortalis-G715 but with fewer cores and no hardware ray tracing support.
The Mali-G715 can scale from seven to nine GPU cores with L2 cache sizes ranging from 512 KB to 2 MB configurable in two or four slices of 256K and 512K. The Mali-G615, on the other hand, scales from one to six cores with two or four L2 cache (512 KB to 2 MB) slices of 256K or 512K each.
Smartphones featuring the Immortalis-G715 are expected to be available from early 2023.