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PowerVR GX6450

Imagination PowerVR GX6450

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).

ManufacturerImagination
PowerVR Series 6XT (Rogue) Series
PowerVR GXA6850 compare 256 @ 0.45 GHz128 Bit
PowerVR GX6450 128 @ 0.45 GHz64 Bit
PowerVR GX6250 compare 64 @ 0.7 GHz64 Bit
CodenameRogue
ArchitecturePowerVR Rogue
Pipelines128 - unified
Core Speed450 (?) MHz
Memory Bus Width64 Bit
Shared Memoryno
DirectXDirectX 10
technology20 nm
FeaturesOpenGL 3.x, 4.x, OpenGL ES 3.0
Date of Announcement09.09.2014
Link to Manufacturer Pagehttp://www.imgtec.com/powervr/series6xt....
CPU in PowerVR GX6450GPU Base SpeedGPU Boost / Turbo
Apple A82 x 1400 MHz? MHz? MHz

Benchmarks

GFXBench (DX / GLBenchmark) 2.7
GLBench 2.7 T-Rex HD Offscreen C24Z16 +
GLBench 2.7 T-Rex HD Onscreen C24Z16 +
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

Game Benchmarks

The 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.

League of Legends: Wild Rift

League of Legends: Wild Rift

2020

For more games that might be playable and a list of all games and graphics cards visit our Gaming List

Add one or more devices and compare

In the following list you can select (and also search for) devices that should be added to the comparison. You can select more than one device.

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Notebook reviews with PowerVR GX6450 graphics card

Apple iPad Mini 4: Apple A8, 7.90", 0.3 kg
  Review » Apple iPad Mini 4 First Impressions

  Review » Apple iPad Mini 4 Tablet Review

Apple iPhone 6: Apple A8, 4.70", 0.1 kg
  Review » Apple iPhone 6 Smartphone Review

Apple iPhone 6 Plus: Apple A8, 5.50", 0.2 kg
  Review » Apple iPhone 6 Plus Smartphone Review

Apple iPad Mini 4: Apple A8, 7.90", 0.3 kg
  External Review » Apple iPad Mini 4

Apple iPhone 6: Apple A8, 4.70", 0.1 kg
  External Review » Apple iPhone 6

Apple iPhone 6 Plus: Apple A8, 5.50", 0.2 kg
  External Review » Apple iPhone 6 Plus

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» Comparison of GPUs
Detailed list of all laptop GPUs sorted by class and performance.

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» Notebook Gaming List
Playable games for each graphics card and their average FPS results.

Class 3

A15 GPU 5-Core *
A15 GPU 4-Core *

Class 4

Class 5

Class 6

* Approximate position of the graphics adapter

> Notebook / Laptop Reviews and News > Benchmarks / Tech > Comparison of Laptop Graphics Cards > Imagination PowerVR GX6450
Klaus Hinum (Update: 2016-01-26)