AMD Radeon HD 8790M vs ATI Mobility Radeon HD 3870 X2

Comparative analysis of AMD Radeon HD 8790M and ATI Mobility Radeon HD 3870 X2 videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory. Benchmark videocards performance analysis: PassMark - G3D Mark, PassMark - G2D Mark, Geekbench - OpenCL, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps), 3DMark Fire Strike - Graphics Score.

AMD Radeon HD 8790M

ATI Mobility Radeon HD 3870 X2

Differences

Reasons to consider the AMD Radeon HD 8790M

Videocard is newer: launch date 4 year(s) 7 month(s) later
Around 29% higher core clock speed: 850 MHz vs 660 MHz
A newer manufacturing process allows for a more powerful, yet cooler running videocard: 28 nm vs 55 nm
2x more maximum memory size: 2 GB vs 2x 512 MB
2.4x more memory clock speed: 4000 MHz vs 1700 MHz
2.7x better performance in PassMark - G3D Mark: 1306 vs 478
4x better performance in PassMark - G2D Mark: 751 vs 187

Specifications (specs)
Launch date	1 April 2013 vs 1 September 2008
Core clock speed	850 MHz vs 660 MHz
Manufacturing process technology	28 nm vs 55 nm
Maximum memory size	2 GB vs 2x 512 MB
Memory clock speed	4000 MHz vs 1700 MHz
Benchmarks
PassMark - G3D Mark	1306 vs 478
PassMark - G2D Mark	751 vs 187

Reasons to consider the ATI Mobility Radeon HD 3870 X2

9.7x more texture fill rate: 2x 10.56 GTexel / s billion / sec vs 21.6 GTexel / s
Around 67% higher pipelines: 640 vs 384
Around 22% better floating-point performance: 2x 422.4 gflops vs 691.2 gflops

Texture fill rate	2x 10.56 GTexel / s billion / sec vs 21.6 GTexel / s
Pipelines	640 vs 384
Floating-point performance	2x 422.4 gflops vs 691.2 gflops

Compare benchmarks

GPU 1: AMD Radeon HD 8790M
GPU 2: ATI Mobility Radeon HD 3870 X2

PassMark - G3D Mark

GPU 1

GPU 2

1306

478

PassMark - G2D Mark

GPU 1

GPU 2

751

187

Name	AMD Radeon HD 8790M	ATI Mobility Radeon HD 3870 X2
PassMark - G3D Mark	1306	478
PassMark - G2D Mark	751	187
Geekbench - OpenCL	4804
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	12.759
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	465.631
CompuBench 1.5 Desktop - T-Rex (Frames/s)	1.576
CompuBench 1.5 Desktop - Video Composition (Frames/s)	28.839
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	80.418
GFXBench 4.0 - Car Chase Offscreen (Frames)	2181
GFXBench 4.0 - Manhattan (Frames)	2656
GFXBench 4.0 - T-Rex (Frames)	2014
GFXBench 4.0 - Car Chase Offscreen (Fps)	2181
GFXBench 4.0 - Manhattan (Fps)	2656
GFXBench 4.0 - T-Rex (Fps)	2014
3DMark Fire Strike - Graphics Score	1607

Compare specifications (specs)

	AMD Radeon HD 8790M	ATI Mobility Radeon HD 3870 X2
Essentials
Architecture	GCN 1.0	TeraScale
Code name	Mars	M88
Design	AMD Radeon HD 8000M Series
Launch date	1 April 2013	1 September 2008
Place in performance rating	864	867
Type	Desktop	Laptop
Technical info
Boost clock speed	850 MHz
Compute units	6
Core clock speed	850 MHz	660 MHz
Floating-point performance	691.2 gflops	2x 422.4 gflops
Manufacturing process technology	28 nm	55 nm
Pipelines	384	640
Texture fill rate	21.6 GTexel / s	2x 10.56 GTexel / s billion / sec
Transistor count	1,040 million	666 million
Thermal Design Power (TDP)		110 Watt
Video outputs and ports
Display Connectors	No outputs	No outputs
Compatibility, dimensions and requirements
Interface	MXM-A (3.0)	PCIe 2.0 x16
Laptop size	medium sized	large
Supplementary power connectors	None
API support
DirectX	11	10.1
OpenGL	4.4	3.3
Memory
Maximum RAM amount	2 GB	2x 512 MB
Memory bandwidth	64 GB / s	2x 54.4 GB / s
Memory bus width	128 Bit	256 Bit
Memory clock speed	4000 MHz	1700 MHz
Memory type	GDDR5	GDDR3
Shared memory	0	0