GeForce GT 640M vs Radeon HD 4850

In this comparison between GeForce GT 640M and Radeon HD 4850 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 640M will be the best choice, for others Radeon HD 4850 will be their preference. Study the comparison tables below and make your choice.

GeForce GT 640M is a Laptop Graphics Card

Note: GeForce GT 640M 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 640M here:

Main Specs

  GeForce GT 640M Radeon HD 4850
Power consumption (TDP) 32 Watt 110 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors 1x 6-pin
Memory type DDR3\GDDR5 GDDR3
Maximum RAM amount 2 GB 512 MB
Display Connectors No outputs 2x DVI, 1x S-Video
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  • Radeon HD 4850 has 243% more power consumption, than GeForce GT 640M.
  • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon HD 4850 uses PCIe 2.0 x16 interface.
  • Radeon HD 4850 has 510 GB more memory, than GeForce GT 640M.
  • GeForce GT 640M is used in Laptops, and Radeon HD 4850 - in Desktops.
  • GeForce GT 640M is build with Kepler architecture, and Radeon HD 4850 - with Terascale 1.
  • GeForce GT 640M is manufactured by 28 nm process technology, and Radeon HD 4850 - by 55 nm process technology.
  • Memory clock speed of GeForce GT 640M is 807 MHz higher, than Radeon HD 4850.

Game benchmarks

high / 1080p 0−1 1−2
ultra / 1080p 0−1 0−1
QHD / 1440p 0−1 0−1
low / 720p 10−12 12−14
medium / 1080p 2−3 3−4
The average gaming FPS of Radeon HD 4850 in Assassin's Creed Odyssey is 33% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M Radeon HD 4850
Architecture Kepler Terascale 1
Code name N13P-GS RV770
Type Laptop Desktop
Release date 22 March 2012 25 June 2008
Pipelines 384 800
Core clock speed 625 MHz
Boost Clock 645 MHz
Transistor count 1,270 million 956 million
Manufacturing process technology 28 nm 55 nm
Texture fill rate 25.00
Floating-point performance 480.0 gflops 1,000.0 gflops
Length 246 mm
Memory bus width 128bit 256 Bit
Memory clock speed 1800 - 4000 MHz 993 MHz
Memory bandwidth 63.55 GB/s
Shared memory -
DirectX 12 API 10.1 (10_1)
Shader Model 5.1 4.1
OpenGL 4.5 3.3
OpenCL 1.1 1.1
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) 18 Mh/s
Laptop size medium sized
Optimus +
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