AMD Radeon HD 8400 vs NVIDIA GeForce GT 640 OEM
Comparison of Radeon HD 8400 and GeForce GT 640 OEM architecture, market type and release date.
Place in performance rating
23 May 2013
24 April 2012
Radeon HD 8400 and GeForce GT 640 OEM's general performance parameters such as number of shaders, GPU core clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of Radeon HD 8400 and GeForce GT 640 OEM's performance, but for precise assessment you have to consider its benchmark and gaming test results.
Core clock speed
Manufacturing process technology
Power consumption (TDP)
Texture fill rate
25.5 GTexel / s
Compatibility, dimensions and requirements
Information on Radeon HD 8400 and GeForce GT 640 OEM compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.
PCIe 3.0 x16
Supplementary power connectors
Parameters of memory installed on Radeon HD 8400 and GeForce GT 640 OEM: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors don't have dedicated memory and use a shared part of system RAM.
Maximum RAM amount
Memory bus width
Memory clock speed
28.51 GB / s
Video outputs and ports
Types and number of video connectors present on Radeon HD 8400 and GeForce GT 640 OEM.
1x DVI, 1x HDMI, 1x DisplayPort
APIs supported by Radeon HD 8400 and GeForce GT 640 OEM, sometimes including their particular versions.
DirectX 11.1, Shader 5.0
Rendering quality tests
GFXBench render quality
GFXBench high precision render quality
Cryptocurrency mining performance of Radeon HD 8400 and GeForce GT 640 OEM. Usually measured in megahashes per second.
Bitcoin / BTC (SHA256)
Advantages of AMD Radeon HD 8400
Much newer (23 May 2013 vs 24 April 2012)
Advantages of NVIDIA GeForce GT 640 OEM
More pipelines (384 vs 128)
So, HD 8400 or GT 640 OEM?
Technical City couldn't decide between AMD Radeon HD 8400 and NVIDIA GeForce GT 640 OEM. We've got no test results to judge.
Be aware that Radeon HD 8400 is a notebook card while GeForce GT 640 OEM is a desktop one.
Should you still have questions on choice between Radeon HD 8400 and GeForce GT 640 OEM, ask them in Comments section, and we shall answer.