GeForce 940MX vs Radeon HD 6990

If you are going to buy a new graphics card and are choosing between GeForce 940MX and Radeon HD 6990, 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 GeForce 940MX stacks up against Radeon HD 6990, check out specs charts below.

GeForce 940MX is a Laptop Graphics Card

Note: GeForce 940MX 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 940MX here:

Main Specs

  GeForce 940MX Radeon HD 6990
Power consumption (TDP) 23 Watt 375 Watt
Interface PCIe 3.0 x8 PCIe 2.0 x16
Supplementary power connectors None 2x 8-pin
Memory type DDR3, GDDR5 GDDR5
Maximum RAM amount 4 GB 2 GB
Display Connectors No outputs 1x DVI, 4x mini-DisplayPort
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  • Radeon HD 6990 has 1530% more power consumption, than GeForce 940MX.
  • GeForce 940MX is connected by PCIe 3.0 x8, and Radeon HD 6990 uses PCIe 2.0 x16 interface.
  • GeForce 940MX has 2 GB more memory, than Radeon HD 6990.
  • GeForce 940MX is used in Laptops, and Radeon HD 6990 - in Desktops.
  • GeForce 940MX is build with Maxwell architecture, and Radeon HD 6990 - with TeraScale 3.
  • Core clock speed of GeForce 940MX is 292 MHz higher, than Radeon HD 6990.
  • GeForce 940MX is manufactured by 28 nm process technology, and Radeon HD 6990 - by 40 nm process technology.
  • Memory clock speed of Radeon HD 6990 is 1000 MHz higher, than GeForce 940MX.

Game benchmarks

high / 1080p 7−8 14−16
ultra / 1080p 4−5 9−10
QHD / 1440p 0−1 3−4
low / 720p 16−18 30−35
medium / 1080p 8−9 18−20
The average gaming FPS of Radeon HD 6990 in Assassin's Creed Odyssey is 111% more, than GeForce 940MX.

Full Specs

  GeForce 940MX Radeon HD 6990
Architecture Maxwell TeraScale 3
Code name N16S-GTR-B/S Antilles
Type Laptop Desktop
Release date 10 March 2016 8 March 2011
Pipelines 384 1536
Core clock speed 1122 MHz 830 MHz
Boost Clock 1242 MHz
Transistor count 1,870 million 2,640 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 23.83 79.68
Floating-point performance 762.6 gflops 2x 2,549.8 gflops
Length 295 mm
Memory bus width 64 Bit 256 Bit
Memory clock speed 4000 MHz 5000 MHz
Memory bandwidth 40.1 GB/s 160.0 GB/s
Shared memory -
DirectX 12 (11_0) 11.2 (11_0)
Shader Model 5.1 5.0
OpenGL 4.5 4.4
OpenCL 1.2 1.2
Vulkan 1.1 N/A
CUDA +
Bus support PCI Express 3.0
Bitcoin / BTC (SHA256) 102 Mh/s 265 Mh/s
Laptop size medium sized
Optimus +
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
GPU Boost 2.0
GameWorks +
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