Radeon HD 6990M vs Radeon R6 Carrizo

If you are going to buy a new graphics card and are choosing between Radeon HD 6990M and Radeon R6 Carrizo, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the Radeon HD 6990M stacks up against Radeon R6 Carrizo, check out specs charts below.

Radeon HD 6990M and Radeon R6 Carrizo are Laptop Graphics Cards

Note: Radeon HD 6990M and Radeon R6 Carrizo are only used in laptop graphics. They have lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Radeon HD 6990M or Radeon R6 Carrizo here:

Main Specs

  Radeon HD 6990M Radeon R6 Carrizo
Power consumption (TDP) 100 Watt 12-35 Watt
Interface MXM-B (3.0)
Supplementary power connectors None
Memory type GDDR5
Maximum RAM amount 2 GB
Display Connectors No outputs
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  • Radeon HD 6990M has 733% more power consumption, than Radeon R6 Carrizo.
  • Both cards are used in Laptops.
  • Radeon HD 6990M is build with Terascale 2 architecture, and Radeon R6 Carrizo - with GCN 1.2/2.0.
  • Radeon HD 6990M is manufactured by 40 nm process technology, and Radeon R6 Carrizo - by 28 nm process technology.

Game benchmarks

high / 1080p 14−16 0−1
ultra / 1080p 8−9 0−1
QHD / 1440p 3−4 0−1
low / 720p 30−33 10−12
medium / 1080p 16−18 2−3
The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 300% more, than Radeon R6 Carrizo.

Full Specs

  Radeon HD 6990M Radeon R6 Carrizo
Architecture Terascale 2 GCN 1.2/2.0
Code name Blackcomb XTX Carrizo
Type Laptop Laptop
Release date 12 July 2011 4 June 2015
Pipelines 1120 384
Core clock speed 715 MHz
Boost Clock 800 MHz
Transistor count 1,700 million 2410 Million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 40.04
Floating-point performance 1,601.6 gflops
Memory bus width 256 Bit 64/128 Bit
Memory clock speed 900 MHz
Memory bandwidth 115.2 GB/s
Shared memory - +
DirectX 11.2 (11_0) DirectX 12 (FL 12_0)
Shader Model 5.0
OpenGL 4.4
OpenCL 1.2
Vulkan N/A
Laptop size large medium sized
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