GRID K520 vs Radeon HD 6990

If you are going to buy a new graphics card and are choosing between GRID K520 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 GRID K520 stacks up against Radeon HD 6990, check out specs charts below.

Main Specs

  GRID K520 Radeon HD 6990
Power consumption (TDP) 225 Watt 375 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors 1x 8-pin 2x 8-pin
Memory type 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 66% more power consumption, than GRID K520.
  • GRID K520 is connected by PCIe 3.0 x16, and Radeon HD 6990 uses PCIe 2.0 x16 interface.
  • GRID K520 has 2 GB more memory, than Radeon HD 6990.
  • Both cards are used in Desktops.
  • GRID K520 is build with Kepler architecture, and Radeon HD 6990 - with TeraScale 3.
  • Core clock speed of Radeon HD 6990 is 85 MHz higher, than GRID K520.
  • GRID K520 is manufactured by 28 nm process technology, and Radeon HD 6990 - by 40 nm process technology.
  • Radeon HD 6990 is 28 mm longer, than GRID K520.
  • Memory clock speed of GRID K520 and Radeon HD 6990 is 5000 MHz.

Game benchmarks

high / 1080p 16−18 14−16
ultra / 1080p 9−10 9−10
QHD / 1440p 4−5 3−4
4K / 2160p 4−5
low / 720p 30−35 30−35
medium / 1080p 20−22 18−20
The average gaming FPS of GRID K520 in Assassin's Creed Odyssey is 6% more, than Radeon HD 6990.

Full Specs

  GRID K520 Radeon HD 6990
Architecture Kepler TeraScale 3
Code name GK104 Antilles
Type Workstation Desktop
Release date 23 July 2013 8 March 2011
Pipelines 1536 1536
Core clock speed 745 MHz 830 MHz
Transistor count 3,540 million 2,640 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 95.36 79.68
Floating-point performance 2x 2,448 gflops 2x 2,549.8 gflops
Length 267 mm 295 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 5000 MHz 5000 MHz
Memory bandwidth 160.0 GB/s 160.0 GB/s
DirectX 12 (11_0) 11.2 (11_0)
Shader Model 5.1 5.0
OpenGL 4.6 4.4
OpenCL 1.2 1.2
Vulkan 1.1.126 N/A
CUDA 3.0
Bitcoin / BTC (SHA256) 76 Mh/s 265 Mh/s
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
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