AMD’s new RDNA 3 processors with on-chip AI Engine Explained

AMD at CES 2023 announced the new Ryzen 7040 series mobile processors, codenamed “Phoenix Point” with RDNA 3 Graphics and on-chip AI Engine.

The 7040 series for laptops and handheld consoles are ultrathin processors that use 4nm process technology based on Zen 4 architecture and houses almost 25 billion transistors, nearly twice as many as the Ryzen 6000 series processors. These new processors will enable more than 30 hours of battery life.

The Zen 4 technology offers up to 8 cores and 16 threads with up to 5.2 GHz boost and a 12-core GPU.

ModelCores / ThreadsBase / Boost FrequencyTotal CacheTDPGPU
Ryzen 9 7940HS8C / 16T4.0 GHz / 5.2 GHz40 MB35-54 WRadeon 780M (3000MHz)
Ryzen 7 7840HS8C / 16T3.8 GHz / 5.1 GHz40 MB35-54 WRadeon 780M (2900MHz)
Ryzen 5 7640HS6C / 12T4.3 GHz / 5.0 GHz 38 MB35-54 WRadeon 760M (2800MHz)

The Radeon 780M has RDNA 3 graphics with 12 Compute Units (= 768 shaders) while the Radeon 680M has 8 Compute Units (= 512 shaders)

These new processors have PCI-Express 4.0 interface and will support DDR5/LPDDR5/LPDDR5x Memory and are compatible with USB 4.

These processors are powered by a dedicated Ryzen AI Engine that uses the new XDNA technology. AMD has rapidly integrated the FPGA technology it acquired with Xilinx last year to integrate a new FPGA-based AI engine directly into the die of the new 7040 series processors. Ryzen AI allows four AI threads to run simultaneously, thus realizing multi-threaded workloads. At the same time, all unit resources can be used to work on one task.

The iGPU of “Phoenix Point” is confirmed to feature AMD’s latest Radiance Display Engine, with support for DisplayPort 2.1 UHBR10 and HDMI 2.1, with native support for 8K 60 Hz displays with a single cable. It also features the latest VCN media engine, with hardware-accelerated AV1 encoding up to 4K @ 240 Hz 10 bpc, and 4320p @ 175 Hz 8 bpc H.265; and hardware-accelerated decoding of nearly all standard resolutions/bit-depth/framerates of MPEG2, VC1, VP9, H.264, H.265, and AV1.

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