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).

 

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

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