ATI Radeon HD 4855 vs ATI Mobility Radeon HD 4550

Comparative analysis of ATI Radeon HD 4855 and ATI Mobility Radeon HD 4550 videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory, Technologies. Benchmark videocards performance analysis: PassMark - G3D Mark, PassMark - G2D Mark, GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - T-Rex (Fps).

ATI Radeon HD 4855

ATI Mobility Radeon HD 4550

Differences

Reasons to consider the ATI Radeon HD 4855

Around 5% higher core clock speed: 575 MHz vs 550 MHz
4.2x more texture fill rate: 18.4 GTexel / s vs 4.4 GTexel / s
8x more pipelines: 640 vs 80
8.4x better floating-point performance: 736.0 gflops vs 88 gflops
2.6x more memory clock speed: 3600 MHz vs 1400 MHz

Core clock speed	575 MHz vs 550 MHz
Texture fill rate	18.4 GTexel / s vs 4.4 GTexel / s
Pipelines	640 vs 80
Floating-point performance	736.0 gflops vs 88 gflops
Memory clock speed	3600 MHz vs 1400 MHz

Compare benchmarks

GPU 1: ATI Radeon HD 4855
GPU 2: ATI Mobility Radeon HD 4550

Name	ATI Radeon HD 4855	ATI Mobility Radeon HD 4550
PassMark - G3D Mark		191
PassMark - G2D Mark		290
GFXBench 4.0 - T-Rex (Frames)		782
GFXBench 4.0 - T-Rex (Fps)		782

Compare specifications (specs)

	ATI Radeon HD 4855	ATI Mobility Radeon HD 4550
Essentials
Architecture	TeraScale	TeraScale
Code name	RV770	M92
Launch date	3 January 2010	1 January 2010
Place in performance rating	not rated	1047
Type	Desktop	Laptop
Technical info
Core clock speed	575 MHz	550 MHz
Floating-point performance	736.0 gflops	88 gflops
Manufacturing process technology	55 nm	55 nm
Pipelines	640	80
Texture fill rate	18.4 GTexel / s	4.4 GTexel / s
Thermal Design Power (TDP)	110 Watt
Transistor count	956 million	242 million
Video outputs and ports
Display Connectors	1x DVI, 1x HDMI, 1x VGA	No outputs
Compatibility, dimensions and requirements
Interface	PCIe 2.0 x16	MXM-II
Length	220 mm
Supplementary power connectors	1x 6-pin
API support
DirectX	10.1	10.1
OpenGL	3.3	3.3
Memory
Maximum RAM amount	512 MB	512 MB
Memory bandwidth	115.2 GB / s	11.2 GB / s
Memory bus width	256 Bit	64 Bit
Memory clock speed	3600 MHz	1400 MHz
Memory type	GDDR5	GDDR3, DDR2, DDR3
Shared memory		0
Technologies
1x Dual-Link/Single-Link DVI
1x Single-Link DVI Support (all display ports have to be supported by the laptop manufacturer)
DisplayPort support up to 2560x1600
HDMI support up to 1920x1080 (both with 7.1 AC3 Audio)
PCI-E 2.0 x16
Powerplay