ATI Radeon HD 4855 videocard review

Radeon HD 4855 videocard released by ATI; release date: 3 January 2010. The videocard is designed for desktop-computers and based on TeraScale microarchitecture codenamed RV770.

Core clock speed - 575 MHz. Texture fill rate - 18.4 GTexel / s. Pipelines - 640. Floating-point performance - 736.0 gflops. Manufacturing process technology - 55 nm. Transistors count - 956 million. Power consumption (TDP) - 110 Watt.

Memory type: GDDR5. Maximum RAM amount - 512 MB. Memory bus width - 256 Bit. Memory clock speed - 3600 MHz. Memory bandwidth - 115.2 GB / s.

Specifications (specs)

Essentials
Architecture	TeraScale
Code name	RV770
Launch date	3 January 2010
Place in performance rating	not rated
Type	Desktop
Technical info
Core clock speed	575 MHz
Floating-point performance	736.0 gflops
Manufacturing process technology	55 nm
Pipelines	640
Texture fill rate	18.4 GTexel / s
Thermal Design Power (TDP)	110 Watt
Transistor count	956 million

Video outputs and ports
Display Connectors	1x DVI, 1x HDMI, 1x VGA
Compatibility, dimensions and requirements
Interface	PCIe 2.0 x16
Length	220 mm
Supplementary power connectors	1x 6-pin
API support
DirectX	10.1
OpenGL	3.3
Memory
Maximum RAM amount	512 MB
Memory bandwidth	115.2 GB / s
Memory bus width	256 Bit
Memory clock speed	3600 MHz
Memory type	GDDR5