Apple A9 / PowerVR GT7600 vs Apple A9X / PowerVR Series 7XT

Apple A9 / PowerVR GT7600

► remove Imagination A9 / PowerVR GT7600

The PowerVR GT7600 from Imagination Technologies is a high-end smartphone GPU as part of the Apple A9 SoC for the iPhone 6s and 6s Plus. At the time of announcement on September 2015, it is the fastest GPU for smartphones and even bests current tablet GPUs.

Architecture

The GT7600 is part of the Series 7XT line-up and is based on a unified shader architecture with 6 clusters that integrate 384 (FP16) and 192 (FP32) ALU cores. Compared to the Series 6XT GPU in the Apple A8 and A8x, ImgTec states that the performance and efficiency of the cores have been improved. Furthermore, the GPU features support for virtualization, hardware-based security, geometry shaders, tessellation, native 10-bit YUV and ASTC LDR/HDR. DirectX 11 and OpenCL FP64 are optional features that are likely not implemented on Apple smartphones and tablets.

Performance

The PowerVR GT7600 is clearly the fastest smartphone GPU on the market as of September 2015. In all of our benchmarks, the GPU is able to beat even the fastest tablet and smartphone GPUs like the PowerVR GXA6850 in the A8x (iPad Air 2), Tegra K1 (Nvidia Shield Tablet) and Adreno 430 (various flagship smartphones). The ARM Mali-T760 MP8 (7420 Octa) in the Galaxy S6 line-up is also no match for the PowerVR GPU. 

The Tegra X1 in the Shield TV console is able to beat the GT7600 in 3DMark 2013 Unlimited GPU (135%), but falls behind in GFXBench 3.0 Manhattan with 79% of the performance. Thanks to the efficient use of the GPU (e.g., IOS apps using Metal), we are expecting a graphical step up in 3D games.

Power Consumption

The PowerVR GT7600 in the Apple A9 should be very energy efficient due in part to the use of 3D transistors and an improved 14/16 nm fabrication process.

Note: The PowerVR GT7600 in the Apple A9 is not officially confirmed by Apple!

Apple A9X / PowerVR Series 7XT

► remove Imagination A9X / PowerVR GT7xxx

The Apple A9X / PowerVR Series 7XT GPU is an integrated graphics card in the Apple A9X SoC which can be found in the 2015 Apple iPad Pro. At the End of 2015 it is one of the fastest GPU in ARM based tablets (next to the Nvidia Tegra X1).

According to Chipworks, the GPU offers 12 shader clusters (384 ALUs) and therefore twice as many as the A9 (6 clusters, 192 ALUs) in the iPhone 6S. Currently there is no marketing name for the 12 shader version and it seems to be a custom variant for Apple. It is manufactured in 14/16 nm (3D transistors) at TSMC and Samsung (according to rumors).

The performance of the GPU is very good and in GFXBench the results are even better than a current GeForce 940M laptop graphics card. However, the direct comparisons of different platforms should only give a rough indication on the speed. Thanks to the Metal API, the iPad is able to use the graphics hardware very efficiently.

Apple A9 / PowerVR GT7600Apple A9X / PowerVR Series 7XT
ManufacturerImaginationImagination
PowerVR Series 7XT Series
A9X / PowerVR GT7xxx 384
A9 / PowerVR GT7600 192
A9X / PowerVR GT7xxx 384
A9 / PowerVR GT7600 192
CodenameRogueRogue
ArchitecturePowerVR RoguePowerVR Rogue
192 - 384 -
nono
DirectXDirectX 11_2DirectX 11_2
Technology14/16 nm14/16 nm
FeaturesOpenGL® ES 1.x/2.0/3.x*, AEP, OpenGL 3.3*, DirectX 10_0, OpenCL™ 1.2 EP*, (DirectX 11_2, OpenGL 4.3*, OpenCL 1.2 FP*)OpenGL® ES 1.x/2.0/3.x*, AEP, OpenGL 3.3*, DirectX 10_0, OpenCL™ 1.2 EP*, (DirectX 11_2, OpenGL 4.3*, OpenCL 1.2 FP*)
Introduced09.09.2015 09.09.2015
Manufacturerhttp://imgtec.com/powervr/graphics/serie...http://imgtec.com/powervr/graphics/serie...
CPUGPU Base SpeedGPU Boost / Turbo
Apple A92 x 1800 MHz? MHz? MHz

3DMark - Ice Storm Unlimited Graphics Score 1280x720 offscreen
min: 41615     avg: 43251     median: 43372.5 (8%)     max: 44645 Points
min: 50084     avg: 50604     median: 50604 (10%)     max: 51124 Points
3DMark - Sling Shot OpenGL ES 3.0 Unlimited 2560x1440
2729 Points (20%)
4544 Points (34%)
3DMark - Sling Shot OpenGL ES 3.0 Unlimited Graphics 2560x1440
4763 Points (17%)
9110 Points (32%)
3DMark - Sling Shot Extreme (ES 3.1) Unlimited 2560x1440
2015 Points (25%)
3822 Points (47%)
3DMark - Sling Shot Extreme (ES 3.1) Unlimited Graphics 2560x1440
2651 Points (32%)
5895 Points (70%)
GFXBench (DX / GLBenchmark) 2.7
T-Rex HD Offscreen C24Z16 1920x1080 + Apple A9 / PowerVR GT7600
T-Rex HD Offscreen C24Z16 1920x1080 + Apple A9X / PowerVR Series 7XT
T-Rex HD Onscreen C24Z16 + Apple A9 / PowerVR GT7600
T-Rex HD Onscreen C24Z16 + Apple A9X / PowerVR Series 7XT
GFXBench 3.0 - Manhattan Offscreen OGL off screen
min: 38.4     avg: 39.6     median: 39.8 (7%)     max: 40.6 fps
min: 51     avg: 65.6     median: 65.6 (12%)     max: 80.1 fps
GFXBench 3.0 - Manhattan Onscreen OGL on screen
min: 28.7     avg: 45.3     median: 47.2 (13%)     max: 58.1 fps
min: 33.3     avg: 34.2     median: 34.2 (9%)     max: 35.1 fps
GFXBench - Aztec Ruins High Tier Onscreen
8 fps (5%)
GFXBench - Aztec Ruins High Tier Offscreen 2560x1440
12.2 fps (7%)
GFXBench - Aztec Ruins Normal Tier Onscreen
13.9 fps (7%)
GFXBench - Aztec Ruins Normal Tier Offscreen 1920x1080
34.7 fps (8%)
GFXBench - Car Chase Offscreen off screen
32.4 fps (8%)
GFXBench - Car Chase Onscreen on screen
13.3 fps (5%)
PassMark PerformanceTest Mobile V1 - 2D Graphics Tests
min: 3484     avg: 4797     median: 5130 (24%)     max: 5445 Points
min: 4072     avg: 4263     median: 4263 (20%)     max: 4454 Points
PassMark PerformanceTest Mobile V1 - 3D Graphics Tests
min: 1161     avg: 1766     median: 1957.5 (31%)     max: 1987 Points
min: 1174     avg: 1175     median: 1175 (19%)     max: 1176 Points

Average Benchmarks Apple A9 / PowerVR GT7600 → 100%

Average Benchmarks Apple A9X / PowerVR Series 7XT → 126%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2017-09-11)