GeForce GTX 660 vs Radeon 540X

If you are going to buy a new graphics card and are choosing between GeForce GTX 660 and Radeon 540X, 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 GTX 660 stacks up against Radeon 540X, check out specs charts below.

Radeon 540X is a Laptop Graphics Card

Note: Radeon 540X 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 540X here:

Main Specs

  GeForce GTX 660 Radeon 540X
Power consumption (TDP) 140 Watt 50 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors One 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
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  • GeForce GTX 660 has 180% more power consumption, than Radeon 540X.
  • GeForce GTX 660 is connected by PCIe 3.0 x16, and Radeon 540X uses PCIe 3.0 x8 interface.
  • GeForce GTX 660 and Radeon 540X have maximum RAM of 2 GB.
  • GeForce GTX 660 is used in Desktops, and Radeon 540X - in Laptops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon 540X - with GCN 4.0.
  • GeForce GTX 660 is manufactured by 28 nm process technology, and Radeon 540X - by 14 nm process technology.
  • Memory clock speed of Radeon 540X is 5994 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 6−7
ultra / 1080p 12−14 3−4
QHD / 1440p 6−7 0−1
4K / 2160p 5−6
low / 720p 40−45 14−16
medium / 1080p 24−27 7−8
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 212% more, than Radeon 540X.

Full Specs

  GeForce GTX 660 Radeon 540X
Architecture Kepler GCN 4.0
Code name GK106 Lexa
Type Desktop Laptop
Release date 6 September 2012 12 August 2019
Pipelines 960 512
Core clock speed 980 MHz
Boost Clock 1033 MHz 1219 MHz
Transistor count 2,540 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 78.4 billion/sec 33.47
Floating-point performance 1,981 gflops
Length 9.5" (24.1 cm)
Memory bus width 192-bit GDDR5 64 Bit
Memory clock speed 6.0 GB/s 6000 MHz
Memory bandwidth 144.2 GB/s 112.0 GB/s
Shared memory -
DirectX 12 (11_0) 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.3 4.6
OpenCL 1.2 2.0
Vulkan 1.1.126 1.2.131
CUDA +
CUDA cores 960
Bus support PCI Express 3.0
Height 4.376" (11.1 cm)
SLI options +
Multi monitor support 4 displays
HDMI +
HDCP +
Maximum VGA resolution 2048x1536
Audio input for HDMI Internal
3D Blu-Ray +
3D Gaming +
3D Vision +
Bitcoin / BTC (SHA256) 66 Mh/s
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