Radeon HD 6770 vs Radeon HD 6990M

In this comparison between Radeon HD 6770 and Radeon HD 6990M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Radeon HD 6770 will be the best choice, for others Radeon HD 6990M will be their preference. Study the comparison tables below and make your choice.

Radeon HD 6990M is a Laptop Graphics Card

Note: Radeon HD 6990M is only used in laptop graphics. It has 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 here:

Main Specs

  Radeon HD 6770 Radeon HD 6990M
Power consumption (TDP) 108 Watt 100 Watt
Interface PCIe 2.0 x16 MXM-B (3.0)
Supplementary power connectors 1x 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 2 GB
Display Connectors 2x DVI, 1x HDMI, 2x mini-DisplayPort No outputs
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  • Radeon HD 6770 has 8% more power consumption, than Radeon HD 6990M.
  • Radeon HD 6770 is connected by PCIe 2.0 x16, and Radeon HD 6990M uses MXM-B (3.0) interface.
  • Radeon HD 6990M has 1 GB more memory, than Radeon HD 6770.
  • Radeon HD 6770 is used in Desktops, and Radeon HD 6990M - in Laptops.
  • Radeon HD 6770 is build with TeraScale 2 architecture, and Radeon HD 6990M - with Terascale 2.
  • Radeon HD 6770 and Radeon HD 6990M are manufactured by 40 nm process technology.
  • Memory clock speed of Radeon HD 6770 is 150 MHz higher, than Radeon HD 6990M.

Game benchmarks

high / 1080p 3−4 14−16
ultra / 1080p 1−2 8−9
QHD / 1440p 0−1 3−4
low / 720p 14−16 30−33
medium / 1080p 5−6 16−18
The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 200% more, than Radeon HD 6770.

Full Specs

  Radeon HD 6770 Radeon HD 6990M
Architecture TeraScale 2 Terascale 2
Code name Juniper Blackcomb XTX
Type Desktop Laptop
Release date 21 January 2011 12 July 2011
Pipelines 800 1120
Core clock speed 715 MHz
Boost Clock 900 MHz
Transistor count 1,040 million 1,700 million
Manufacturing process technology 40 nm 40 nm
Texture fill rate 34.00 40.04
Floating-point performance 1,360.0 gflops 1,601.6 gflops
Length 198 mm
Memory bus width 128 Bit 256 Bit
Memory clock speed 1050 MHz 900 MHz
Memory bandwidth 76.8 GB/s 115.2 GB/s
Shared memory -
DirectX 11.2 (11_0)
Shader Model 5.0 5.0
OpenGL 4.4 4.4
OpenCL 1.2 1.2
Vulkan N/A
Bus support PCIe 2.0 x16
HDMI +
Bitcoin / BTC (SHA256) 118 Mh/s
Laptop size large
Eyefinity +
Design reference
CrossFire +
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