GeForce GTX 680MX vs Radeon HD 6990

When comparing GeForce GTX 680MX and Radeon HD 6990, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GTX 680MX and Radeon HD 6990 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce GTX 680MX is a Laptop Graphics Card

Note: GeForce GTX 680MX 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 GeForce GTX 680MX here:

Main Specs

  GeForce GTX 680MX Radeon HD 6990
Power consumption (TDP) 122 Watt 375 Watt
Interface PCIe 2.0 x16
Supplementary power connectors 2x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors 1x DVI, 4x mini-DisplayPort
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  • Radeon HD 6990 has 207% more power consumption, than GeForce GTX 680MX.
  • GeForce GTX 680MX and Radeon HD 6990 have maximum RAM of 2 GB.
  • GeForce GTX 680MX is used in Laptops, and Radeon HD 6990 - in Desktops.
  • GeForce GTX 680MX is build with Kepler architecture, and Radeon HD 6990 - with TeraScale 3.
  • Core clock speed of Radeon HD 6990 is 110 MHz higher, than GeForce GTX 680MX.
  • GeForce GTX 680MX is manufactured by 28 nm process technology, and Radeon HD 6990 - by 40 nm process technology.
  • Memory clock speed of Radeon HD 6990 is 2500 MHz higher, than GeForce GTX 680MX.

Game benchmarks

high / 1080p 21−24 14−16
ultra / 1080p 12−14 9−10
QHD / 1440p 7−8 3−4
4K / 2160p 5−6
low / 720p 40−45 30−35
medium / 1080p 27−30 18−20
The average gaming FPS of GeForce GTX 680MX in Assassin's Creed Odyssey is 46% more, than Radeon HD 6990.

Full Specs

  GeForce GTX 680MX Radeon HD 6990
Architecture Kepler TeraScale 3
Code name Antilles
Type Laptop Desktop
Release date 23 October 2012 8 March 2011
Pipelines 1536 1536
Core clock speed 720 MHz 830 MHz
Transistor count 3540 Million 2,640 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 92.2 billion/sec 79.68
Floating-point performance 2x 2,549.8 gflops
Length 295 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 2500 MHz 5000 MHz
Memory bandwidth 160 GB/s 160.0 GB/s
Shared memory -
DirectX 12 API 11.2 (11_0)
Shader Model 5.0
OpenGL 4.5 4.4
OpenCL 1.1 1.2
Vulkan N/A
CUDA +
CUDA cores 1536
Bus support PCI Express 3.0
SLI options +
3D Vision +
Bitcoin / BTC (SHA256) 57 Mh/s 265 Mh/s
Laptop size large
Optimus +
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
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