Bobcat (microarchitecture)

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Bobcat - Family 14h
General Info
Launchedearly 2011
Discontinuedpresent
Common manufacturer(s)
Architecture and classification
Min. feature size40 nm
Instruction setAMD64 (x86-64)
Physical specifications
Socket(s)
Products, models, variants
Core name(s)
History
SuccessorJaguar - Family 16h

The AMD Bobcat Family 14h is a microarchitecture created by AMD for its AMD APUs, aimed at a low-power/low-cost market.[1]

It was revealed during a speech from AMD executive vice-president Henri Richard in Computex 2007 and was put into production Q1 2011.[2] One of the major supporters was executive vice-president Mario A. Rivas who felt it was difficult to compete in the x86 market with a single core optimized for the 10–100 W range and actively promoted the development of the simpler core with a target range of 1–10 W. In addition, it was believed that the core could migrate into the hand-held space if the power consumption can be reduced to less than 1 W.

Bobcat cores are used together with GPU cores in accelerated processing units (APUs) under the "Fusion" brand.[3][4] A simplified architecture diagram was released at AMD's Analyst Day in November 2009. This is similar in concept with earlier AMD research in 2003,[5] detailing the specifications and advantages of extending x86 "everywhere".

Design[edit]

The Bobcat x86 CPU core design has since been completed and implemented in AMD APU processor products with a TDP of 18 W or less. The core is targeted at low-power markets like netbooks/nettops, ultra-portable laptops, consumer electronics and the embedded market. Since its launch, Bobcat-based CPUs have also been used by OEMs on larger laptops. Architecture specifics:[6]

In February 2013, AMD detailed plans for a successor to Bobcat codenamed Jaguar.

Feature overview[edit]

The following table shows features of AMD's APUs (see also: List of AMD accelerated processing units).

Codename Server Toronto Kyoto
Desktop Llano Trinity Richland Kaveri Carrizo Bristol Ridge Raven Ridge Picasso Kabini
Mobile Llano Trinity Richland Kaveri Carrizo Bristol Ridge Dalí Raven Ridge Picasso Renoir Desna, Ontario, Zacate Kabini, Temash Beema, Mullins Carrizo-L Stoney Ridge
Embedded Trinity Bald Eagle Merlin Falcon,
Brown Falcon
Banded Kestrel Great Horned Owl Ontario, Zacate Kabini Steppe Eagle, Crowned Eagle,
LX-Family
Prairie Falcon
Platform High, standard and low power Low and ultra-low power
Released Aug 2011 Oct 2012 Jun 2013 Jan 2014 Jun 2015 Jun 2016 Apr 2019 Oct 2017 Jan 2019 2020 Jan 2011 May 2013 Apr 2014 May 2015 Feb 2016
CPU microarchitecture K10 Piledriver Steamroller Excavator "Excavator+"[7] Zen Zen+ Zen 2 Bobcat Jaguar Puma Puma+[8] "Excavator+"
Socket Desktop FM1 FM2 FM2+ FM2+[a], AM4 AM4 AM4 N/A AM1 N/A
Other FS1 FS1+, FP2 FP3 FP4 FP5 FP6 FT1 FT3 FT3b FP4
PCI Express version 2.0 3.0 2.0 3.0
Fab. (nm) GlobalFoundries 32SHP
(HKMG SOI)
GlobalFoundries 28SHP
(HKMG bulk)
GlobalFoundries 14LPP
(FinFET bulk)
GlobalFoundries 12LP
(FinFET bulk)
TSMC N7
(FinFET bulk)
TSMC N40
(bulk)
TSMC N28
(HKMG bulk)
GlobalFoundries 28SHP
(HKMG bulk)
die area (mm2) 228 246 245 245 250 210[9] 210 149 75 (+ 28 FCH) 107 ? 125
Min TDP 35W 17W 12W 4.5W 4W 3.95W 10W 6W
Max APU TDP 100W 95W 65W 25W 65W 45W 18W 25W
Max stock APU base clock (GHz) 3 3.8 4.1 3.7 3.8 3.3 3.6 3.7 3 1.75 2.2 2 2.2 3.2
Max APU cores 4 2 4 8 2 4 2
Max threads per core 1 2 1
Integer structure 3+3 2+2 4+2 4+2+1 1+1+1+1 2+2
FPUs per core 1 0.5 1 1 0.5
FPU pipe width 128-bit 256-bit 64-bit 128-bit
CPU instruction set SIMD level SSE3 AVX AVX2 SSSE3 AVX AVX2
L1 data cache per core (KiB) 64 16 32 32
L1 data cache associativity (ways) 2 4 8 8
L1 instruction caches per core 1 0.5 1 1 0.5
Max APU total L1 instruction cache (KiB) 256 128 192 128 256 64 128 96
L1 instruction cache associativity (ways) 2 3 4 8 2 3
L2 caches per core 1 0.5 1 1 0.5
Max APU total L2 cache (MiB) 4 2 1 2 4 1 2 1
L2 cache associativity (ways) 16 8 16
APU total L3 cache (MiB) N/A 4 8 N/A
APU L3 cache associativity (ways) 16
L3 cache scheme victim N/A victim
Max stock DRAM support DDR3-1866 DDR3-2133 DDR3-2133, DDR4-2400 DDR4-2400 DDR4-2933 DDR4-3200, LPDDR4-4266 DDR3L-1333 DDR3L-1600 DDR3L-1866 DDR3-1866, DDR4-2400
DRAM channels 2 1
Max stock DRAM bandwidth (GB/s) 29.866 34.132 38.400 46.932 68.256 10.666 12.800 14.933 19.200
GPU microarchitecture TeraScale 2 (VLIW5) TeraScale 3 (VLIW4) GCN 2nd gen GCN 3rd gen GCN 5th gen[10] TeraScale 2 (VLIW5) GCN 2nd gen GCN 3rd gen[10]
GPU instruction set TeraScale instruction set GCN instruction set TeraScale instruction set GCN instruction set
Max stock GPU base clock (MHz) 600 800 844 866 1108 1100 1250 1400 1750 538 600 ? 847 900
Max stock GPU base GFLOPS[b] 480 614.4 648.1 886.7 1134.5 460.8 1760 1971.2 1792 86 ? ? ? 345.6
3D engine[c] Up to 400:20:8 Up to 384:24:6 Up to 512:32:8 Up to 192:?:? Up to 704:44:16[11] Up to 512:?:? 80:8:4 128:8:4 Up to 192:?:?
IOMMUv1 IOMMUv2 IOMMUv1 ?
Video decoder UVD 3.0 UVD 4.2 UVD 6.0 VCN 1.0[12] UVD 3.0 UVD 4.0 UVD 4.2 UVD 6.0 UVD 6.3
Video encoder N/A VCE 1.0 VCE 2.0 VCE 3.1 N/A VCE 2.0 VCE 3.1
GPU power saving PowerPlay PowerTune PowerPlay PowerTune[13]
TrueAudio N/A Yes[14] N/A Yes
FreeSync 1
2
1
2
HDCP[d] ? 1.4 1.4
2.2
? 1.4
PlayReady[d] N/A 3.0 not yet N/A
Supported displays[e] 2–3 2–4 3 4 3 (desktop)
4 (mobile)
2 3
/drm/radeon[f][16][17] Yes N/A Yes N/A
/drm/amdgpu[f][18] N/A Yes[19] Yes N/A Yes[19] Yes
  1. ^ APU models: A8-7680, A6-7480. CPU only: Athlon X4 845.
  2. ^ Single-precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.
  3. ^ Unified shaders : texture mapping units : render output units
  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. ^ To feed more than two displays, the additional panels must have native DisplayPort support.[15] Alternatively active DisplayPort-to-DVI/HDMI/VGA adapters can be employed.
  6. ^ a b DRM (Direct Rendering Manager) is a component of the Linux kernel. Support in this table refers to the most current version.

Processors[edit]

In January 2011 AMD introduced several processors that have implemented the Bobcat core. This core is in the following AMD Accelerated Processors:[6][20][21]

AMD C-60
Series ^ Model CPU clock
(MHz)
CPU
cores
TDP
(W)
L2 cache
(KiB)
Radeon
cores
GPU clock
(MHz)
DirectX
version
UVD DDR3 speed
C-Series C-30 1000 1 09 512 80 277 11 UVD 3 1066
C-Series C-50 1000 2 09 2*512 80 276 11 UVD 3 1066
C-Series C-60 1000/1333 (turbo) 2 09 2*512 80 276/400 (turbo) 11 UVD 3 1066
C-Series C-70 1000/1333 (turbo) 2 09 2*512 80 276/400 (turbo) 11 UVD 3 1066
E-Series E-240 1500 1 18 512 80 500 11 UVD 3 1066
E-Series E-300 1300 2 18 2*512 80 500 11 UVD 3 1066
E-Series E-350 1600 2 18 2*512 80 492 11 UVD 3 1066
E-Series E-450 1650 2 18 2*512 80 508/600 (turbo) 11 UVD 3 1333[22]
E-Series E1-1200 1400 2 18 2*512 80 500 11 UVD 3 1066
E-Series E1-1500[23] 1480 2 18 2*512 80 529 11 UVD 3 1066
E-Series E2-1800 1700 2 18 2*512 80 523/680 11 UVD 3 1333
E-Series E2-2000[23] 1750 2 18 2*512 80 538/700 11 UVD 3 1333
G-Series T-24L 0800 1 05 512 80 ? ? ? 1066
G-Series T-30L 1400 1 18 512 80 ? ? ? 1333
G-Series T-40N 1000 2 09 2*512 80 276 11 UVD 3 1066
G-Series T-44R 1200 1 09 512 80 276 11 UVD 3 1066
G-Series T-48E 1400 2 18 2*512 80 280 11 UVD 3 1066
G-Series T-48L 1400 2 18 2*512 80 ? ? ? 1066
G-Series T-48N 1400 2 18 2*512 80 492 11 UVD 3 1066
G-Series T-52R 1500 1 18 512 80 492 11 UVD 3 1066
G-Series T-56N 1600 2 18 2*512 80 492 11 UVD 3 1066
Z-Series Z-01 1000 2 5.9 2*512 80 276 11 UVD 3 1066
Z-Series Z-60[24] 1000 2 4.5 2*512 80 275 11 UVD 3 1066

^ E-Series & C-Series are standard parts, G-Series are embedded parts

See also[edit]

References[edit]

  1. ^ "List of AMD CPU microarchitectures - LeonStudio". LeonStudio - CodeFun. 3 August 2014. Retrieved 12 September 2015.
  2. ^ Hruska, Joel (July 16, 2010). "AMD Flip-Flops: Llano Later, Bobcat Bounding Forward". HotHardware.
  3. ^ Gunning for Mobilty: Intel and AMD Bet on a Mobile Internet, Dailytech.com, 2007-06-13, archived from the original on 2014-02-02, retrieved 2012-01-27
  4. ^ "Analyst Day 2009 Presentations". AMD. November 11, 2009. Retrieved 2009-11-14.
  5. ^ AMD 2003 Microprocessor Forum Slides: Slide 11 and Slide 22
  6. ^ a b AMD Embedded G-Series Platform (PDF), AMD, archived from the original (PDF) on 2013-09-11, retrieved 2012-01-27
  7. ^ "AMD Announces the 7th Generation APU: Excavator mk2 in Bristol Ridge and Stoney Ridge for Notebooks". 31 May 2016. Retrieved 3 January 2020.
  8. ^ "AMD Mobile "Carrizo" Family of APUs Designed to Deliver Significant Leap in Performance, Energy Efficiency in 2015" (Press release). 20 November 2014. Retrieved 16 February 2015.
  9. ^ "The Mobile CPU Comparison Guide Rev. 13.0 Page 5 : AMD Mobile CPU Full List". TechARP.com. Retrieved 13 December 2017.
  10. ^ a b "AMD VEGA10 and VEGA11 GPUs spotted in OpenCL driver". VideoCardz.com. Retrieved 6 June 2017.
  11. ^ 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.
  12. ^ Larabel, Michael (17 November 2017). "Radeon VCN Encode Support Lands in Mesa 17.4 Git". Phoronix. Retrieved 20 November 2017.
  13. ^ Tony Chen; Jason Greaves, "AMD's Graphics Core Next (GCN) Architecture" (PDF), AMD, retrieved 13 August 2016
  14. ^ "A technical look at AMD's Kaveri architecture". Semi Accurate. Retrieved 6 July 2014.
  15. ^ "How do I connect three or More Monitors to an AMD Radeon™ HD 5000, HD 6000, and HD 7000 Series Graphics Card?". AMD. Retrieved 8 December 2014.
  16. ^ Airlie, David (26 November 2009). "DisplayPort supported by KMS driver mainlined into Linux kernel 2.6.33". Retrieved 16 January 2016.
  17. ^ "Radeon feature matrix". freedesktop.org. Retrieved 10 January 2016.
  18. ^ Deucher, Alexander (16 September 2015). "XDC2015: AMDGPU" (PDF). Retrieved 16 January 2016.
  19. ^ a b Michel Dänzer (17 November 2016). "[ANNOUNCE] xf86-video-amdgpu 1.2.0". lists.x.org.
  20. ^ AMD Accelerated Processors for Mainstream Notebooks, AMD, 2012-01-17, retrieved 2012-01-27
  21. ^ All-In-One Desktops With AMD Accelerated Processors, AMD, retrieved 2012-07-02
  22. ^ The Brazos Update: AMD's E-450, Anandtech.com, 2011-06-01, retrieved 2012-01-27
  23. ^ a b https://www.amd.com/us/products/notebook/pages/consumer-notebooks.aspx#7
  24. ^ https://www.amd.com/us/products/notebook/tablets/Pages/tablets.aspx#3

External links[edit]