GeForce GT 640 vs GeForce GTX 580

When choosing between GeForce GT 640 and GeForce GTX 580, 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 640 and GeForce GTX 580.

Main Specs

  GeForce GT 640 GeForce GTX 580
Power consumption (TDP) 65 Watt 244 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors None One 6-pin and One 8-pin
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 1536 MB
Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort 2x DVI, 1x mini-HDMI
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  • GeForce GTX 580 has 275% more power consumption, than GeForce GT 640.
  • GeForce GT 640 is connected by PCIe 3.0 x16, and GeForce GTX 580 uses PCIe 2.0 x16 interface.
  • GeForce GTX 580 has 1534 GB more memory, than GeForce GT 640.
  • Both cards are used in Desktops.
  • GeForce GT 640 is build with Kepler architecture, and GeForce GTX 580 - with Fermi.
  • Core clock speed of GeForce GTX 580 is 642 MHz higher, than GeForce GT 640.
  • GeForce GT 640 is manufactured by 28 nm process technology, and GeForce GTX 580 - by 40 nm process technology.
  • GeForce GT 640 is 135 mm longer, than GeForce GTX 580.
  • Memory clock speed of GeForce GTX 580 is 222 MHz higher, than GeForce GT 640.

Game benchmarks

high / 1080p 2−3 21−24
ultra / 1080p 1−2 14−16
QHD / 1440p 0−1 8−9
4K / 2160p 6−7
low / 720p 14−16 40−45
medium / 1080p 5−6 27−30
The average gaming FPS of GeForce GTX 580 in Assassin's Creed Odyssey is 350% more, than GeForce GT 640.

Full Specs

  GeForce GT 640 GeForce GTX 580
Architecture Kepler Fermi
Code name GK107 GF110
Type Desktop Desktop
Release date 5 June 2012 9 November 2010
Pipelines 384 512
Core clock speed 902 MHz 1544 MHz
Transistor count 1,270 million 3,000 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 28.86 49.4 billion/sec
Floating-point performance 692.7 gflops 1,581.1 gflops
Length 145 mm 10.5" (267 mm) (26.7 cm)
Memory bus width 128 Bit 384 Bit
Memory clock speed 1782 MHz 2004 MHz (4008 data rate)
Memory bandwidth 28.51 GB/s 192.4 GB/s
DirectX 12 (11_0) 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.6 4.2
OpenCL 1.2 1.1
Vulkan 1.1.126 N/A
CUDA 3.0 +
CUDA cores 512
Bus support PCI-E 2.0 x 16
Height 4.376" (111 mm) (11.1 cm)
SLI options +
Multi monitor support +
HDMI +
Maximum VGA resolution 2048x1536
Audio input for HDMI Internal
Bitcoin / BTC (SHA256) 24 Mh/s 142 Mh/s
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