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AMD Launches Ryzen 4900H “Renoir” Flagship APU

Offers up to 25% IPC Improvement And 7nm Vega GPU

This could be the most powerful mobile processor available to date … Well done AMD. I can’t wait to see what products we’ll be seeing over the next few months.

Taken from Videocardz … Today AMD launches its high-performance Ryzen 4000H series and low-power Ryzen 4000U series for laptops.

Laptops based on Ryzen 4000 Mobile will go on preorders today, however, it may take few weeks for them to be widely available. AMD releases more information on the architecture itself. AMD also confirmed Ryzen 9 4900H flagship CPU.

The Ryzen 4000 Mobile is based on Zen2 architecture, a refined version designed specifically for laptops. The new silicon is codenamed Renoir, it features with up to 8 graphics units and 8 processing cores (16 threads) — which also happen to be the specs of the Ryzen 9 4900H and Ryzen 7 4800U.

AMD claims 25% IPC gain over Ryzen 3000M, 20% lower SoC power, 2x higher power efficiency, and 5x faster state switching. But the integrated graphics received a substantial boost, all Renoir CPUs use 7nm Vega graphics.

The Renoir silicon is fabricated by TSMC in 7nm node, it features 9.8 billion transistors and the package is 25x25x1.38mm in size. This means that the package has twice as many transistors as Picasso while the die is 25% smaller.


Designing for power efficiency

  • Better idle detection – get idle components to low power stages fast
  • Better activity detection – get idle components back to full performance fast
  • Better power state selection – reduce the penalty of power state transition

7nm Vega – making the best graphics engine even better

Reduced engine size for better efficiency and higher performance

  • 2x wide Data Fabric interface for power efficient data transfer
  • Graphics low power state transition optimization
  • 25% higher peak graphics clock
  • 77% higher peak memory bandwidth

Delivered Results

  • Up to 59% higher Time Spy performance per Compute Unit
  • 1.79 TFLOPs (FP32)

Infinity Fabric (Power Optimized for Mobile)

  • Up to 75% better power efficiency
    7nm technology, dynamic power optimization in the fabric switches, double bus width from graphics to fabric improve pj/bit
  • Up to 77% higher memory bandwidth at low power
    DDR4-3200 and LPDDR4x-4266

Memory Controller Design

  • Two memory controllers
  • Each controller can support 1×65 for DDR4 or 2×32 using virtual channels for LPDDR4x
  • 4×32 LPDDR4x4266 (68.3 GB/s peak) OR 2×64 (DDR4-3200 (51.2 GB/s)

Enhanced IO Connectivity while maintaining the same package body size as Picasso

  • Improved Memory Technology (DDR4 up to 3200, LPDDR4X up to 4266)
  • Added 4 PCIe lanes – NVME storage, Wireless Wifi 6, 5G
  • Added 2 USB Ports – Support for increasing Number of Devices

Better Mobile Boost with STT V2

  • Boost duration can be extended for the user by up to 4X by considering chassis temp
  • Surace temp of the notebook can be managed with a closed-loop
  • V2 STT simplifies OEM EC designs by pulling chassis thermal calculations into the SoC
  • Works alongside AMP STAMP technology

AMD SmartShift

  • dGPU and SoC operate as a single virtual domain
  • dGPU performance and thermal counters are shared across PCIe
  • SoC natively managed dGPU boost like its own iGPU with the Infinity Fabric Contol Units
  • Performance governed by platform DPTC settings

Activity Based Clock Controls – power-efficient clock controls

  • System management controller observes activity monitors throughout the cores and interconnect
  • This activity information is used to adjust clocks up or down, as appropriate for the activity level of each IP block
  • Examples; ramp frequency on each core as demand increases or interconnect buses ramp up or down to balance QoS and power
  • Threshold levels can also be adjusted by higher-level inputs such as OS settings or user preferences

Source: Videocardz


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