GeForce GT 640M Mac Edition vs 9400 GT

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Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the rankingnot rated1089
Place by popularitynot in top-100not in top-100
Power efficiencyno data2.25
ArchitectureTesla (2006−2010)Kepler (2012−2018)
GPU code nameG96CGK107
Market segmentDesktopLaptop
Release date27 August 2008 (16 years ago)3 February 2013 (11 years ago)
Launch price (MSRP)$79.99 no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores16384
Core clock speed550 MHz745 MHz
Number of transistors314 million1,270 million
Manufacturing process technology55 nm28 nm
Power consumption (TDP)50 Watt32 Watt
Maximum GPU temperature105 °Cno data
Texture fill rate4.40023.84
Floating-point processing power0.0448 TFLOPS0.5722 TFLOPS
ROPs48
TMUs832

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Bus supportPCI-E 2.0no data
InterfacePCIe 2.0 x16PCIe 3.0 x16
Length168 mmno data
Height4.376" (11.1 cm)no data
Width1-slotno data
Supplementary power connectorsNoneno data
SLI options+-

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory typeDDR2GDDR5
Maximum RAM amount512 MB512 MB
Memory bus width128 Bit64 Bit
Memory clock speed400 MHz1250 MHz
Memory bandwidth12.8 GB/s40 GB/s

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display ConnectorsDual Link DVINo outputs
Multi monitor support+no data
HDMI+-
Maximum VGA resolution2048x1536no data
Audio input for HDMIS/PDIFno data

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX11.1 (10_0)12 (11_0)
Shader Model4.05.1
OpenGL2.14.6
OpenCL1.11.2
VulkanN/A1.1.126
CUDA+3.0

Pros & cons summary


Recency 27 August 2008 3 February 2013
Chip lithography 55 nm 28 nm
Power consumption (TDP) 50 Watt 32 Watt

GT 640M Mac Edition has an age advantage of 4 years, a 96.4% more advanced lithography process, and 56.3% lower power consumption.

We couldn't decide between GeForce 9400 GT and GeForce GT 640M Mac Edition. We've got no test results to judge.

Be aware that GeForce 9400 GT is a desktop card while GeForce GT 640M Mac Edition is a notebook one.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

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NVIDIA GeForce 9400 GT
GeForce 9400 GT
NVIDIA GeForce GT 640M Mac Edition
GeForce GT 640M Mac Edition

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Community ratings

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3.1 9 votes

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