The Imagination Technologies PowerVR GX6450 is a fast mobile graphics solution for smartphones and tablets, which can be found in ARM SoCs such as the Apple A8 (iPhone 6 and iPhone 6 Plus). The chip is available since Q3/2014 and of one of the fastest solutions in its class at the time of introduction.
Architecture and Performance
The GPU is based on the PowerVR Series 6XT (Rogue) Unified Shader architecture and integrates four clusters with two TMUs and 32 FP32-ALUs each. Therefore, the theoretical FP32 (full precision) compute performance per clock is identical to the previous G6430 (also 4 clusters) found in the Apple A7. Thanks to additional dedicated FP16-ALUs, however, the also important FP16 (half precision) performance has been greatly improved.
In the iPhone 6, the GPU should be clocked at around 450 MHz, delivering about 115 GLOPS (FP32). Compared to other mobile graphics solutions, the GX6450 outperforms the Qualcomm Adreno 330 (Snapdragon 800/801) and matches the more recent Adreno 420 (Snapdragon 805). Except for Nvidia's power hungry tablet chip Tegra K1 and its bigger cousin GX6650, the GX6450 is one of the fastest mobile GPUs in late 2014. Even the most advanced games and high resolution displays are handled without any problems. Among others, the GPU supports OpenGL 3.x/4.x, OpenGL ES 3.0 as well as DirectX 10.
Power Consumption
Thanks to the advanced 20-nanometer process and the relatively low clock rate, the GX6450 implementation in Apple's A8 offers a very high energy efficiency. On the other hand, the GPU has a comparatively "wide" architecture requirering a lot of transistors and die size (19 mm² in 20 nm).
PowerVR Series 6XT (Rogue) Series
| ||||||||||
| Codename | Rogue | |||||||||
| Architecture | PowerVR Rogue | |||||||||
| Pipelines | 128 - unified | |||||||||
| Core Speed | 450 (?) MHz | |||||||||
| Memory Bus Width | 64 Bit | |||||||||
| Shared Memory | no | |||||||||
| API | DirectX 10, OpenGL 3.x, 4.x, OpenGL ES 3.0 | |||||||||
| technology | 20 nm | |||||||||
| Features | OpenGL 3.x, 4.x, OpenGL ES 3.0 | |||||||||
| Date of Announcement | 09.09.2014 | |||||||||
| Link to Manufacturer Page | www.imgtec.com | |||||||||
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- Average benchmark values for this graphics cardThe following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailed information on the benchmark results, click on the fps number.
| low | med. | high | ultra | QHD | 4K | |
|---|---|---|---|---|---|---|
| League of Legends: Wild Rift | 59 | |||||
| < 30 fps < 60 fps < 120 fps ≥ 120 fps | 1 | | | | | |
For more games that might be playable and a list of all games and graphics cards visit our Gaming List
Apple iPad Mini 4: Apple A8, 7.90", 0.3 kg
External Review » Apple iPad Mini 4
Apple iPhone 6 Plus: Apple A8, 5.50", 0.2 kg
External Review » Apple iPhone 6 Plus
Apple iPhone 6: Apple A8, 4.70", 0.1 kg
External Review » Apple iPhone 6
» Comparison of GPUs
Detailed list of all laptop GPUs sorted by class and performance.
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Playable games for each graphics card and their average FPS results.
Top 10 Laptops
Multimedia, Budget Multimedia, Gaming, Budget Gaming, Lightweight Gaming, Business, Budget Office, Workstation, Subnotebooks, Ultrabooks, Chromebooks
under 300 USD/Euros, under 500 USD/Euros, 1,000 USD/Euros, for University Students, Best Displays
Top 10 Smartphones
Smartphones, Phablets, ≤6-inch, Camera Smartphones
