GeForce GT 745A vs Radeon HD 6990M Crossfire

When choosing between GeForce GT 745A and Radeon HD 6990M Crossfire, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GT 745A and Radeon HD 6990M Crossfire.

Radeon HD 6990M Crossfire is a Laptop Graphics Card

Note: Radeon HD 6990M Crossfire 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 Crossfire here:

Main Specs

  GeForce GT 745A Radeon HD 6990M Crossfire
Power consumption (TDP) 33 Watt
Interface PCIe 3.0 x16
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 2x2 GB
Display Connectors No outputs
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  • GeForce GT 745A and Radeon HD 6990M Crossfire have maximum RAM of 2 GB.
  • GeForce GT 745A is used in Desktops, and Radeon HD 6990M Crossfire - in Laptops.
  • GeForce GT 745A is build with Kepler architecture, and Radeon HD 6990M Crossfire - with Terascale 2.
  • Core clock speed of GeForce GT 745A is 122 MHz higher, than Radeon HD 6990M Crossfire.
  • GeForce GT 745A is manufactured by 28 nm process technology, and Radeon HD 6990M Crossfire - by 40 nm process technology.
  • Memory clock speed of GeForce GT 745A is 900 MHz higher, than Radeon HD 6990M Crossfire.

Game benchmarks

high / 1080p 2−3 35−40
ultra / 1080p 0−1 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 12−14 60−65
medium / 1080p 4−5 40−45
The average gaming FPS of Radeon HD 6990M Crossfire in Assassin's Creed Odyssey is 683% more, than GeForce GT 745A.

Full Specs

  GeForce GT 745A Radeon HD 6990M Crossfire
Architecture Kepler Terascale 2
Code name GK107 Blackcomb XTX
Type Desktop Laptop
Release date 26 August 2013 12 July 2011
Pipelines 384 2240
Core clock speed 837 MHz 715 MHz
Boost Clock 915 MHz
Transistor count 1,270 million 2x1700 Million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 29.28
Floating-point performance 642.8 gflops
Memory bus width 128 Bit 256 Bit
Memory clock speed 1800 MHz 900 MHz
Memory bandwidth 28.8 GB/s
Shared memory -
DirectX 12 (11_0) DirectX 11, Shader 5.0
Shader Model 5.1
OpenGL 4.6
OpenCL 1.2
Vulkan 1.1.126
CUDA 3.0
Bitcoin / BTC (SHA256) 26 Mh/s
Laptop size large
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