AMD Radeon HD 6990M Crossfire vs AMD Radeon HD 6870 X2

Comparative analysis of AMD Radeon HD 6990M Crossfire and AMD Radeon HD 6870 X2 videocards for all known characteristics in the following categories: Essentials, Technical info, Compatibility, dimensions and requirements, API support, Memory, Video outputs and ports. Benchmark videocards performance analysis: CompuBench 1.5 Desktop - T-Rex (Frames/s).

AMD Radeon HD 6990M Crossfire

AMD Radeon HD 6870 X2

Differences

Reasons to consider the AMD Radeon HD 6990M Crossfire

2x more maximum memory size: 2x2 GB vs 2x 1 GB

Maximum memory size	2x2 GB vs 2x 1 GB

Reasons to consider the AMD Radeon HD 6870 X2

Around 26% higher core clock speed: 900 MHz vs 715 MHz
4.7x more memory clock speed: 4200 MHz vs 900 MHz

Core clock speed	900 MHz vs 715 MHz
Memory clock speed	4200 MHz vs 900 MHz

Compare benchmarks

GPU 1: AMD Radeon HD 6990M Crossfire
GPU 2: AMD Radeon HD 6870 X2

Name	AMD Radeon HD 6990M Crossfire	AMD Radeon HD 6870 X2
CompuBench 1.5 Desktop - T-Rex (Frames/s)		1.807

Compare specifications (specs)

	AMD Radeon HD 6990M Crossfire	AMD Radeon HD 6870 X2
Essentials
Architecture	Terascale 2	TeraScale 2
Code name	Blackcomb XTX	Barts
Launch date	12 July 2011	8 July 2011
Place in performance rating	not rated	1607
Type	Laptop	Desktop
Launch price (MSRP)		$520
Technical info
Core clock speed	715 MHz	900 MHz
Manufacturing process technology	40 nm	40 nm
Pipelines	2240	2x 1120
Transistor count	2x1700 Million	1,700 million
Floating-point performance		2x 2,016.0 gflops
Texture fill rate		2x 50.4 GTexel / s billion / sec
Thermal Design Power (TDP)		300 Watt
Compatibility, dimensions and requirements
Laptop size	large
Interface		PCIe 2.0 x16
Length		304 mm
API support
DirectX	11	11.2 (11_0)
OpenGL		4.4
Memory
Maximum RAM amount	2x2 GB	2x 1 GB
Memory bus width	256 Bit	2x 256 Bit
Memory clock speed	900 MHz	4200 MHz
Memory type	GDDR5	GDDR5
Shared memory	0
Memory bandwidth		2x 134.4 GB / s
Video outputs and ports
Display Connectors		2x DVI, 1x HDMI, 2x mini-DisplayPort