GeForce GTX 860M SLI vs Radeon HD 6990

When comparing GeForce GTX 860M SLI 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 860M SLI 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 860M SLI is a Laptop Graphics Card

Note: GeForce GTX 860M SLI 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 860M SLI here:

Main Specs

  GeForce GTX 860M SLI Radeon HD 6990
Power consumption (TDP) 120 Watt 375 Watt
Interface PCIe 2.0 x16
Supplementary power connectors 2x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2x 4 GB 2 GB
Display Connectors 1x DVI, 4x mini-DisplayPort
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  • Radeon HD 6990 has 212% more power consumption, than GeForce GTX 860M SLI.
  • GeForce GTX 860M SLI and Radeon HD 6990 have maximum RAM of 2 GB.
  • GeForce GTX 860M SLI is used in Laptops, and Radeon HD 6990 - in Desktops.
  • GeForce GTX 860M SLI is build with Maxwell architecture, and Radeon HD 6990 - with TeraScale 3.
  • Core clock speed of GeForce GTX 860M SLI is 199 MHz higher, than Radeon HD 6990.
  • GeForce GTX 860M SLI is manufactured by 28 nm process technology, and Radeon HD 6990 - by 40 nm process technology.
  • Memory clock speed of GeForce GTX 860M SLI and Radeon HD 6990 is 5000 MHz.

Game benchmarks

high / 1080p 21−24 14−16
ultra / 1080p 14−16 9−10
QHD / 1440p 8−9 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 860M SLI in Assassin's Creed Odyssey is 53% more, than Radeon HD 6990.

Full Specs

  GeForce GTX 860M SLI Radeon HD 6990
Architecture Maxwell TeraScale 3
Code name Antilles
Type Laptop Desktop
Release date 12 March 2014 8 March 2011
Pipelines 1280 1536
Core clock speed 1029 MHz 830 MHz
Transistor count 2x 1870 Million 2,640 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 79.68
Floating-point performance 2x 2,549.8 gflops
Length 295 mm
Memory bus width 2x 128 Bit 256 Bit
Memory clock speed 5000 MHz 5000 MHz
Memory bandwidth 160.0 GB/s
Shared memory -
DirectX DirectX 12 (FL 11_0), Shader 5.0 11.2 (11_0)
Shader Model 5.0
OpenGL 4.4
OpenCL 1.2
Vulkan N/A
CUDA +
SLI options +
Bitcoin / BTC (SHA256) 265 Mh/s
Laptop size large
Optimus +
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
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