AMD Radeon HD 6790 vs ATI Mobility Radeon HD 3870 X2

Comparative analysis of AMD Radeon HD 6790 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, 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).

AMD Radeon HD 6790

ATI Mobility Radeon HD 3870 X2

Differences

Reasons to consider the AMD Radeon HD 6790

Videocard is newer: launch date 2 year(s) 7 month(s) later
Around 27% higher core clock speed: 840 MHz vs 660 MHz
Around 25% higher pipelines: 800 vs 640
Around 59% better floating-point performance: 1,344.0 gflops vs 2x 422.4 gflops
A newer manufacturing process allows for a more powerful, yet cooler running videocard: 40 nm vs 55 nm
2.5x more memory clock speed: 4200 MHz vs 1700 MHz
3.4x better performance in PassMark - G3D Mark: 1622 vs 478
Around 99% better performance in PassMark - G2D Mark: 372 vs 187

Specifications (specs)
Launch date	4 April 2011 vs 1 September 2008
Core clock speed	840 MHz vs 660 MHz
Pipelines	800 vs 640
Floating-point performance	1,344.0 gflops vs 2x 422.4 gflops
Manufacturing process technology	40 nm vs 55 nm
Memory clock speed	4200 MHz vs 1700 MHz
Benchmarks
PassMark - G3D Mark	1622 vs 478
PassMark - G2D Mark	372 vs 187

Reasons to consider the ATI Mobility Radeon HD 3870 X2

6.3x more texture fill rate: 2x 10.56 GTexel / s billion / sec vs 33.6 GTexel / s
Around 36% lower typical power consumption: 110 Watt vs 150 Watt

Texture fill rate	2x 10.56 GTexel / s billion / sec vs 33.6 GTexel / s
Thermal Design Power (TDP)	110 Watt vs 150 Watt

Compare benchmarks

GPU 1: AMD Radeon HD 6790
GPU 2: ATI Mobility Radeon HD 3870 X2

PassMark - G3D Mark

GPU 1

GPU 2

1622

478

PassMark - G2D Mark

GPU 1

GPU 2

372

187

Name	AMD Radeon HD 6790	ATI Mobility Radeon HD 3870 X2
PassMark - G3D Mark	1622	478
PassMark - G2D Mark	372	187
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	12.318
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	750.421
CompuBench 1.5 Desktop - T-Rex (Frames/s)	1.234
CompuBench 1.5 Desktop - Video Composition (Frames/s)	28.768
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	121.423
GFXBench 4.0 - Car Chase Offscreen (Frames)	3127
GFXBench 4.0 - Manhattan (Frames)	3534
GFXBench 4.0 - T-Rex (Frames)	3350
GFXBench 4.0 - Car Chase Offscreen (Fps)	3127
GFXBench 4.0 - Manhattan (Fps)	3534
GFXBench 4.0 - T-Rex (Fps)	3350

Compare specifications (specs)

	AMD Radeon HD 6790	ATI Mobility Radeon HD 3870 X2
Essentials
Architecture	TeraScale 2	TeraScale
Code name	Barts	M88
Launch date	4 April 2011	1 September 2008
Launch price (MSRP)	$149
Place in performance rating	865	867
Price now	$64.99
Type	Desktop	Laptop
Value for money (0-100)	39.40
Technical info
Core clock speed	840 MHz	660 MHz
Floating-point performance	1,344.0 gflops	2x 422.4 gflops
Manufacturing process technology	40 nm	55 nm
Pipelines	800	640
Texture fill rate	33.6 GTexel / s	2x 10.56 GTexel / s billion / sec
Thermal Design Power (TDP)	150 Watt	110 Watt
Transistor count	1,700 million	666 million
Video outputs and ports
Display Connectors	2x DVI, 1x HDMI, 1x DisplayPort	No outputs
Compatibility, dimensions and requirements
Interface	PCIe 2.0 x16	PCIe 2.0 x16
Length	198 mm
Supplementary power connectors	2x 6-pin
Laptop size		large
API support
DirectX	11.2 (11_0)	10.1
OpenGL	4.4	3.3
Memory
Maximum RAM amount	1 GB	2x 512 MB
Memory bandwidth	134.4 GB / s	2x 54.4 GB / s
Memory bus width	256 Bit	256 Bit
Memory clock speed	4200 MHz	1700 MHz
Memory type	GDDR5	GDDR3
Shared memory		0