Friday, October 11, 2013

PlayStation 4 & AMD Radeon R9 290X GPU share the same 8 ACE ( Asynchronous Compute Engines )



Newly leaked slides from AMD's new Radeon R9 290X Hawaii GPU  reveals that the Volcanic Islands GPU will also feature 8 Asynchronous Compute Engines much like the Liverpool GPU inside of Sony's new PS4.   

Each of the 8 ACE's can manage up to 8 compute queues for a total of 64 compute commands, in comparison the HD 7970 only has 2 ACE's that could only queue 2 compute commands for a total of 4 & the Xbox One only has 2 ACE's but they also manage up to 8 compute queues for a total of 16 compute queues. 

Could this mean that the PS4's GPU is also a part of  AMD's Volcanic Islands family? 






Below is a diagram of the PlayStation 4 Compute, Queues and Pipelines from VGleaks 


From VGLeaks

"PS4 GPU has a total of 2 rings and 64 queues on 10 pipelines
- Graphics (GFX) ring and pipeline
  • Same as R10xx
  • Graphics and compute
  • For game

- High Priority Graphics (HP3D) ring and pipeline
  • New for Liverpool
  • Same as GFX pipeline except no compute capabilities
  • For exclusive use by VShell

- 8 Compute-only pipelines
  • Each pipeline has 8 queues of a total of 64
  • Replaces the 2 compute-only queues and pipelines on R10XX
  • Can be used by both game and VShell (likely assign on a pipeline basis, 1 for VShell, and 7 for game)
  • Queues can be allocated by game system or by middleware type
  • Allows rendering and compute loads to be processed in parallel
  • Liverpool compute-only pipelines do not have Constant Update Engines (presented in R10XX cards) "  

8 comments:

  1. I am not surprised if The PS4's GPU is based off Volcanic Islands because the entire APU from the PS4 is based off technology AMD is only supposed to release in 1-3 years for desktop. PS4's APU has 8 cores based off of Steamroller or Excavator architecure. So it's natural to presume the same is happening with the GPU side of the APU - they 're using technology that hasn't even been officially released for desktop yet. PS4's APU is currently the worlds fastest APU. 8 cores, decent cache pool, instead of using DDR3 they 're using GDDR5 which is a very very smart choice given that desktop APU's run considerably faster just by slightly bumping up the DDR3 clocks and also the GPU's on the APU is capable of 2 Teraflop of raw compute power given that it's only an APU. So yeah, not surprised here.

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  2. Actually, As far as I know, the APU cores are based on the Jaguar architecture, not the steamroller/excavator. Making an APU with 8 Steamroller chips and 18 CU's of GCN would be a ridiculously massive chip.

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  7. Official PS4 specifications:

    Main Processor:
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    CPU: x86-64 AMD 'Jaguar' 8 cores
    GPU: 1.84 TFLOPS, AMD next-generation Radeon™ based graphics engine
    PlayStation

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