PowerVR GX6450 vs PowerVR GX6250

PowerVR GX6450

► remove 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).

PowerVR GX6250

► remove Imagination PowerVR GX6250

The PowerVR GX6250 from Imagination Technologies is a mobile graphics card for ARM based SoCs. It is usually used in Android based laptops and smartphones. It was first announced in the MediaTek MT8173 in mid 2014. The performance should be in the higher middle class of mobile GPUs.

The graphics card is part of the series 6XT (Rogue) of GPUs and offers a unified shader architecture with two clusters, two TMUs and 32 FP32-ALUs. The GPU supports OpenGL 3.x/4.x, OpenGL ES 3.x and DirectX 10.

In the MT8173 the GPU is clocked at 700 MHz and therefore the performance should be similar to the Adreno 330. Therefore, even demanding games of 2014 should run fluently.

PowerVR GX6450PowerVR GX6250
ManufacturerImaginationImagination
PowerVR Series 6XT (Rogue) Series
PowerVR GXA6850 (compare) 256 @ 450 (?) MHz128 Bit
PowerVR GX6450 128 @ 450 (?) MHz64 Bit
PowerVR GX6250 64 @ 700 (Boost) MHz64 Bit
PowerVR GXA6850 (compare) 256 @ 450 (?) MHz128 Bit
PowerVR GX6450 128 @ 450 (?) MHz64 Bit
PowerVR GX6250 64 @ 700 (Boost) MHz64 Bit
CodenameRogueRogue
ArchitecturePowerVR RoguePowerVR Rogue
128 - 64 -
Core450 (?) MHz700 (Boost) MHz
Bus64 Bit64 Bit
nono
DirectXDirectX 10DirectX 10
Technology20 nm28 nm
FeaturesOpenGL 3.x, 4.x, OpenGL ES 3.0OpenGL 3.x, 4.x, OpenGL ES 3.x
Introduced09.09.2014 09.09.2014
Manufacturerhttp://www.imgtec.com/powervr/series6xt....http://www.imgtec.com/powervr/series6xt....
CPUGPU Base SpeedGPU Boost / Turbo
Apple A82 x 1400 MHz? MHz? MHz

3DMark - Ice Storm Unlimited Graphics Score 1280x720 offscreen
min: 22509     avg: 23756.2     median: 23937 (5%)     max: 25254 Points
min: 11719     avg: 14380.4     median: 14121 (3%)     max: 16690 Points
3DMark - Sling Shot OpenGL ES 3.0 Unlimited 2560x1440
min: 796     avg: 931.7     median: 840 (6%)     max: 1159 Points
3DMark - Sling Shot OpenGL ES 3.0 Unlimited Graphics 2560x1440
min: 754     avg: 891.3     median: 812 (3%)     max: 1108 Points
3DMark - Sling Shot Extreme (ES 3.1) Unlimited 2560x1440
min: 532     avg: 690     median: 612 (10%)     max: 926 Points
3DMark - Sling Shot Extreme (ES 3.1) Unlimited Graphics 2560x1440
min: 506     avg: 614.3     median: 528 (6%)     max: 809 Points
GFXBench (DX / GLBenchmark) 2.7
T-Rex HD Offscreen C24Z16 1920x1080 + PowerVR GX6450
T-Rex HD Offscreen C24Z16 1920x1080 + PowerVR GX6250
T-Rex HD Onscreen C24Z16 + PowerVR GX6450
T-Rex HD Onscreen C24Z16 + PowerVR GX6250
GFXBench 3.0 - Manhattan Offscreen OGL off screen
min: 17     avg: 19.1     median: 18 (3%)     max: 21 fps
min: 8     avg: 12.5     median: 14 (3%)     max: 16 fps
GFXBench 3.0 - Manhattan Onscreen OGL on screen
min: 15     avg: 23.7     median: 24 (7%)     max: 30 fps
min: 6     avg: 8.6     median: 8 (2%)     max: 9 fps
GFXBench - Car Chase Offscreen off screen
min: 2     avg: 3.5     median: 3 (1%)     max: 5 fps
GFXBench - Car Chase Onscreen on screen
min: 2     avg: 3     median: 3 (2%)     max: 3 fps
Basemark X 1.1 - High Quality
min: 15572     avg: 16055     median: 16055 (36%)     max: 16538 fps
PassMark PerformanceTest Mobile V1 - 2D Graphics Tests
min: 2320     avg: 2579.3     median: 2609 (14%)     max: 2809 Points
PassMark PerformanceTest Mobile V1 - 3D Graphics Tests
min: 1060     avg: 1678.7     median: 1984 (35%)     max: 1992 Points

Average Benchmarks PowerVR GX6450 → 100%

Average Benchmarks PowerVR GX6250 → 79%

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

Dead Trigger 2

Dead Trigger 2

2013
high
PowerVR GX6250:
30 59 ~ 45 fps
PowerVR GX6250:
»
Asphalt 8: Airborne

Asphalt 8: Airborne

2013
low
PowerVR GX6250:
30 30 ~ 30 fps
high
PowerVR GX6250:
22 26 ~ 24 fps
PowerVR GX6250:
»
Temple Run 2

Temple Run 2

2013
high
PowerVR GX6250:
60  fps
PowerVR GX6250:
»

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.

restrict list:

show all (including archived), 2019, 2018
v1.8.1a
Please share our article, every link counts!
> Notebook / Laptop Reviews and News > Benchmarks / Tech > Graphics Card Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2017-09-11)