AMD PowerTune

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AMD PowerTune
AMD PowerTune Technology logo 2014.svg
Design firmAdvanced Micro Devices
IntroducedDecember 2011
TypeDynamic frequency scaling

AMD PowerTune is a trademark for a series of dynamic frequency scaling technologies built into some AMD GPUs and APUs that allow the clock speed of the processor to be dynamically changed (to different P-states) by software. This allows the processor to meet the instantaneous performance needs of the operation being performed, while minimizing power draw, heat generation and noise avoidance. AMD PowerTune aims to solve thermal design power and performance constraints.[1]

Besides the reduced energy consumption, AMD PowerTune helps to lower the noise levels created by the cooling in desktop computers, and extends battery life in mobile devices. AMD PowerTune is the successor to AMD PowerPlay.[2]

Support for "PowerPlay" was added to the Linux kernel driver "amdgpu" on November, 11 2015.[3]

As a lecture from CCC in 2014 shows, AMD's x86-64 SMU firmware is executed on some LatticeMico32 and PowerTune was modeled using Matlab.[4] This is similar to Nvidia's PDAEMON, the RTOS responsible for power on their GPUs.[5]

Overview[edit]

Architecture of the PowerTune version, that was introduced with GCN1.1-chips, such as the Bonaire

AMD PowerTune was introduced in the TeraScale 3 (VLIW4) with Radeon HD 6900 in Dec 15, 2010 and has been available in different development stages on Radeon- and AMD FirePro-branded products ever since.

Over the years, reviews which document the development of AMD PowerTune have been published by AnandTech.[6][7][8][9]

An additional technology named AMD ZeroCore Power has been available since the Radeon HD 7000 Series, implementing the Graphics Core Next microarchitecture.

The pointlessness of a fixed clock frequency was accredited in January 2014 by SemiAccurate.[10]

Operating system support[edit]

Support for PowerTune is contained in the Linux kernel device driver amdgpu.

AMD Catalyst is available for Microsoft Windows and Linux and supports AMD PowerTune since version.[which?]

The free and open-source "Radeon" graphics device driver has some support for AMD PowerTune, see "Enduro".[11]

Feature overview for AMD APUs[edit]

Brand Llano Trinity Richland Kaveri Carrizo Bristol Ridge Raven Ridge Desna, Ontario, Zacate Kabini, Temash Beema, Mullins Carrizo-L Stoney Ridge
Platform Desktop, Mobile Ultra-mobile
Released Aug 2011 Oct 2012 Jun 2013 Jan 2014 Jun 2015 Jun 2016 Oct 2017 Jan 2011 May 2013 Q2 2014 May 2015 June 2016
Fab. (nm) GlobalFoundries 32 SOI GlobalFoundries 28 SHP GlobalFoundries 14LPP (FinFET) TSMC 40 28
Die size (mm2) 228 246 245 244.62 250.04 210[12] 75 (+ 28 FCH) ~107 TBA 125
Socket FM1, FS1 FM2, FS1+, FP2 FM2+, FP3 FM2+[a], FP4 AM4, FP4 AM4, FP5 FT1 AM1, FT3 FT3b FP4 FP4
CPU micro-architecture AMD 10h Piledriver Steamroller Excavator Zen Bobcat Jaguar Puma Puma+[13] Excavator
Memory support DDR3-1866
DDR3-1600
DDR3-1333
DDR3-2133
DDR3-1866
DDR3-1600
DDR3-1333
DDR4-2933
DDR4-2667
DDR4-2400
DDR4-2133
DDR3L-1333
DDR3L-1066
DDR3L-1866
DDR3L-1600
DDR3L-1333
DDR3L-1066
DDR3L-1866
DDR3L-1600
DDR3L-1333
Up to
DDR4-2133
3D engine[b] TeraScale (VLIW5) TeraScale (VLIW4) GCN 2nd Gen (Mantle, HSA) GCN 3rd Gen (Mantle, HSA) GCN 5th Gen[14] (Mantle, HSA) TeraScale (VLIW5) GCN 2nd Gen GCN 3rd Gen[14]
Up to 400:20:8 Up to 384:24:6 Up to 512:32:8 Up to 704:44:16[15] 80:8:4 128:8:4 Up to 192:?:?
IOMMUv1 IOMMUv2 IOMMUv1[16] TBA TBA
Video Decoder ASIC UVD 3.0 UVD 4.2 UVD 6.0 VCN 1.0[17] UVD 3.0 UVD 4.0 UVD 4.2 UVD 6.0 UVD 6.3
Video Encoding ASIC N/A VCE 1.0 VCE 2.0 VCE 3.1 N/A VCE 2.0 VCE 3.1
GPU power saving PowerPlay PowerTune N/A PowerTune[18]
Max. displays[c] 2–3 2–4 2–4 3 4 TBA 2 TBA TBA
TrueAudio N/A Yes[20] N/A[16] TBA
FreeSync N/A 1
2
N/A TBA
HDCP[d] ? 1.4 1.4
2.2
? 1.4
PlayReady[d] ? 3.0 (upcoming) ?
/drm/radeon[e][21][11] Yes N/A Yes N/A
/drm/amdgpu[e][22] N/A Yes[23] Yes N/A Yes[23] Yes
  1. ^ No APU models. Athlon X4 845 only.
  2. ^ Unified shaders : texture mapping units : render output units
  3. ^ To feed more than two displays, the additional panels must have native DisplayPort support.[19] Alternatively active DisplayPort-to-DVI/HDMI/VGA adapters can be employed.
  4. ^ a b To play protected video content, it also requires card, operating system, driver, and application support. A compatible HDCP display is also needed for this. HDCP is mandatory for the output of certain audio formats, placing additional constraints on the multimedia setup.
  5. ^ a b DRM (Direct Rendering Manager) is a component of the Linux kernel. Support in this table refers to the most current version.

Feature overview for AMD graphics cards[edit]

The following table shows features of Radeon-branded GPU microarchitectures.

R100 R200 R300 R400 R500 R600 RV670 R700 Evergreen Northern
Islands
Southern
Islands
Sea
Islands
Volcanic
Islands
Arctic
Islands
Vega
Released Apr 2000 Aug 2001 Sep 2002 May 2004 Oct 2005 May 2007 Nov 2007 Jun 2008 Sep 2009 Oct 2010 Jan 2012 Sep 2013 Jun 2015 Jun 2016 Jun 2017
AMD support Ended Current
Instruction set Not publicly known TeraScale instruction set GCN instruction set
Microarchitecture TeraScale 1 (VLIW5) TeraScale 2 (VLIW5) TeraScale 3 (VLIW4) GCN 1st gen GCN 2nd gen GCN 3rd gen GCN 4th gen GCN 5th gen
Type Fixed pipeline[a] Programmable pixel & vertex pipelines Unified shader model
Direct3D 7.0 8.1 9.0
11 (9_2)
9.0b
11 (9_2)
9.0c
11 (9_3)
10.0
11 (10_0)
10.1
11 (10_1)
11 (11_0) 11 (11_1)
12 (11_1)
11 (12_0)
12 (12_0)
11 (12_1)
12 (12_1)
Shader model N/A 1.4 2.0+ 2.0b 3.0 4.0 4.1 5.0 5.1
6.0
OpenGL 1.3 2.0[b] 3.3 4.4[c] 4.6 with GLSL 4.5 (Linux 4.5+)
Vulkan N/A Linux Mesa 17+
Win 7+: 1.0
1.1
OpenCL N/A Close to Metal 1.1 1.2 2.0 (2.1 in Windows Adrenalin, 1.2 in Linux)
HSA N/A Yes
Power saving ? PowerPlay PowerTune PowerTune & ZeroCore Power
Video decoder ASIC N/A Avivo/UVD UVD+ UVD 2 UVD 2.2 UVD 3 UVD 4 UVD 4.2 UVD 5.0 or 6.0 UVD 6.3 UVD 7[24][d]
Video encoding ASIC N/A VCE 1.0 VCE 2.0 VCE 3.0 or 3.1 VCE 3.4 VCE 4.0[24][d]
TrueAudio N/A Via dedicated DSP Via shaders
FreeSync N/A 1
2
HDCP[e] ? 1.4 1.4
2.2
PlayReady[e] N/A 3.0
Max. displays[f] 1–2 2 2–6
Max. resolution ? 2–6 × 2560×1600 2–6 × 4096×2160 @ 60 Hz 2–6 × 5120×2880 @ 60 Hz 3 × 7680×4320 @ 60 Hz[25]
/drm/radeon[g] Yes N/A
/drm/amdgpu[g] N/A Experimental[26] Yes
  1. ^ The Radeon 100 Series has programmable pixel shaders, but do not fully comply with DirectX 8 or Pixel Shader 1.0. See article on R100's pixel shaders.
  2. ^ These series do not fully comply with OpenGL 2+ as the hardware does not support all types of non power of two (NPOT) textures.
  3. ^ OpenGL 4+ compliance requires supporting FP64 shaders and these are emulated on some TeraScale chips using 32-bit hardware.
  4. ^ a b The UVD and VCE were replaced by the Video Core Next (VCN) ASIC in the Raven Ridge APU implementation of Vega.
  5. ^ a b To play protected video content, it also requires card, operating system, driver, and application support. A compatible HDCP display is also needed for this. HDCP is mandatory for the output of certain audio formats, placing additional constraints on the multimedia setup.
  6. ^ More displays may be supported with native DisplayPort connections, or splitting the maximum resolution between multiple monitors with active converters.
  7. ^ a b DRM (Direct Rendering Manager) is a component of the Linux kernel. Support in this table refers to the most current version.

See also[edit]

References[edit]

  1. ^ "AMD PowerTune Technology" (pdf). AMD. 2012-03-23.
  2. ^ "AMD PowerTune vs PowerPlay" (pdf). AMD. 2010-12-01.
  3. ^ "Add amdgpu powerplay support". 2015-11-11.
  4. ^ "AMD x86 SMU firmware analysis". 2014-12-27.
  5. ^ "Reverse engineering power management on Nvidia GPUs" (PDF).
  6. ^ "Redefining TDP With PowerTune". AnandTech. 2010-12-15.
  7. ^ "Introducing PowerTune Technology With Boost". AnandTech. 2012-06-22.
  8. ^ "The New PowerTune: Adding Further States". AnandTech. 2013-03-22.
  9. ^ "PowerTune: Improved Flexibility & Fan Speed Throttling". AnandTech. 2014-10-23.
  10. ^ "What is AMD's PowerTune 2.0 and what does it do?". SemiAccurate. 2013-12-16.
  11. ^ a b "Radeon feature matrix". freedesktop.org. Retrieved 2016-01-10.
  12. ^ "The Mobile CPU Comparison Guide Rev. 13.0 Page 5 : AMD Mobile CPU Full List". TechARP.com. Retrieved 13 December 2017.
  13. ^ "AMD Mobile "Carrizo" Family of APUs Designed to Deliver Significant Leap in Performance, Energy Efficiency in 2015" (Press release). 2014-11-20. Retrieved 2015-02-16.
  14. ^ a b "AMD VEGA10 and VEGA11 GPUs spotted in OpenCL driver". VideoCardz.com. Retrieved 6 June 2017.
  15. ^ Cutress, Ian (1 February 2018). "Zen Cores and Vega: Ryzen APUs for AM4 - AMD Tech Day at CES: 2018 Roadmap Revealed, with Ryzen APUs, Zen+ on 12nm, Vega on 7nm". Anandtech. Retrieved 7 February 2018.
  16. ^ a b Thomas De Maesschalck (2013-11-14). "AMD teases Mullins and Beema tablet/convertibles APU". Retrieved 2015-02-24.
  17. ^ Larabel, Michael (17 November 2017). "Radeon VCN Encode Support Lands In Mesa 17.4 Git". Phoronix. Retrieved 20 November 2017.
  18. ^ Tony Chen; Jason Greaves, "AMD's Graphics Core Next (GCN) Architecture" (PDF), AMD, retrieved 2016-08-13
  19. ^ "How do I connect three or More Monitors to an AMD Radeon™ HD 5000, HD 6000, and HD 7000 Series Graphics Card?". AMD. Retrieved 2014-12-08.
  20. ^ "A technical look at AMD's Kaveri architecture". Semi Accurate. Retrieved 6 July 2014.
  21. ^ Airlie, David (2009-11-26). "DisplayPort supported by KMS driver mainlined into Linux kernel 2.6.33". Retrieved 2016-01-16.
  22. ^ Deucher, Alexander (2015-09-16). "XDC2015: AMDGPU" (PDF). Retrieved 2016-01-16.
  23. ^ a b Michel Dänzer (2016-11-17). "[ANNOUNCE] xf86-video-amdgpu 1.2.0". lists.x.org.
  24. ^ a b Killian, Zak (22 March 2017). "AMD publishes patches for Vega support on Linux". Tech Report. Retrieved 23 March 2017.
  25. ^ "Radeon's next-generation Vega architecture" (PDF). radeon.com. Radeon Technologies Group (AMD). 13 June 2017.
  26. ^ Larabel, Michael (7 December 2016). "The Best Features Of The Linux 4.9 Kernel". Phoronix. Retrieved 7 December 2016.

External links[edit]