ATI Mobility Radeon HD 4870 X2 videocard review

Mobility Radeon HD 4870 X2 videocard released by ATI; release date: 9 January 2009. The videocard is designed for laptop-computers and based on TeraScale microarchitecture codenamed M98.

Core clock speed - 550 MHz. Texture fill rate - 2x 22 GTexel / s billion / sec. Pipelines - 1600. Floating-point performance - 2x 880.0 gflops. Manufacturing process technology - 55 nm. Transistors count - 956 million.

Memory type: GDDR3, GDDR5. Maximum RAM amount - 2x 1 GB. Memory bus width - 256 Bit. Memory clock speed - 2800 MHz. Memory bandwidth - 2x 89.6 GB / s. Shared memory - 0.

Specifications (specs)

Essentials
Architecture	TeraScale
Code name	M98
Launch date	9 January 2009
Place in performance rating	not rated
Type	Laptop
Technical info
Core clock speed	550 MHz
Floating-point performance	2x 880.0 gflops
Manufacturing process technology	55 nm
Pipelines	1600
Texture fill rate	2x 22 GTexel / s billion / sec
Transistor count	956 million

Video outputs and ports
Display Connectors	No outputs
Compatibility, dimensions and requirements
Interface	PCIe 2.0 x16
Laptop size	large
API support
DirectX	10.1
OpenGL	3.3
Memory
Maximum RAM amount	2x 1 GB
Memory bandwidth	2x 89.6 GB / s
Memory bus width	256 Bit
Memory clock speed	2800 MHz
Memory type	GDDR3, GDDR5
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