GeForce GT 645M vs Radeon HD 5830

In this comparison between GeForce GT 645M and Radeon HD 5830 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce GT 645M will be the best choice, for others Radeon HD 5830 will be their preference. Study the comparison tables below and make your choice.

GeForce GT 645M is a Laptop Graphics Card

Note: GeForce GT 645M 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 GT 645M here:

Main Specs

  GeForce GT 645M Radeon HD 5830
Power consumption (TDP) 32 Watt 175 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors 2x 6-pin
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 1 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 5830 has 446% more power consumption, than GeForce GT 645M.
  • GeForce GT 645M is connected by PCIe 3.0 x16, and Radeon HD 5830 uses PCIe 2.0 x16 interface.
  • GeForce GT 645M has 1 GB more memory, than Radeon HD 5830.
  • GeForce GT 645M is used in Laptops, and Radeon HD 5830 - in Desktops.
  • GeForce GT 645M is build with Kepler architecture, and Radeon HD 5830 - with TeraScale 2.
  • GeForce GT 645M is manufactured by 28 nm process technology, and Radeon HD 5830 - by 40 nm process technology.
  • Memory clock speed of Radeon HD 5830 is 2200 MHz higher, than GeForce GT 645M.

Game benchmarks

high / 1080p 1−2 8−9
ultra / 1080p 0−1 5−6
QHD / 1440p 0−1 0−1
low / 720p 12−14 18−20
medium / 1080p 2−3 10−11
The average gaming FPS of Radeon HD 5830 in Assassin's Creed Odyssey is 140% more, than GeForce GT 645M.

Full Specs

  GeForce GT 645M Radeon HD 5830
Architecture Kepler TeraScale 2
Code name N13P-GS Cypress
Type Laptop Desktop
Release date 22 March 2012 25 February 2010
Pipelines 384 1120
Core clock speed 800 MHz
Transistor count 1,270 million 2,154 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 22.7 billion/sec 44.80
Floating-point performance 544.5 gflops 1,792.0 gflops
Length 282 mm
Memory bus width 128bit 256 Bit
Memory clock speed 1800 MHz 4000 MHz
Memory bandwidth 128.0 GB/s
Shared memory -
DirectX 12 API 11.2 (11_0)
Shader Model 5.1 5.0
OpenGL 4.5 4.4
OpenCL 1.1 1.2
Vulkan 1.1.126 N/A
CUDA +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 19 Mh/s
Laptop size medium sized
Optimus +
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