GeForce GT 640 Rev. 2 vs GT 820M

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Aggregate performance score

We've compared GeForce GT 820M with GeForce GT 640 Rev. 2, including specs and performance data.

GT 820M
2013
1 GB DDR3, 15 Watt
1.45

GT 640 Rev. 2 outperforms GT 820M by a whopping 145% based on our aggregate benchmark results.

Primary details

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

Place in the ranking986717
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data0.19
Power efficiency6.975.23
ArchitectureFermi 2.0 (2010−2014)Kepler 2.0 (2013−2015)
GPU code nameGF117GK208
Market segmentLaptopDesktop
Release date27 November 2013 (10 years ago)29 May 2013 (11 years ago)
Launch price (MSRP)no data$89

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

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 cores96384
Core clock speed775 MHz1046 MHz
Number of transistors585 million915 million
Manufacturing process technology28 nm28 nm
Power consumption (TDP)15 Watt49 Watt
Texture fill rate12.4033.47
Floating-point processing power0.2976 TFLOPS0.8033 TFLOPS
ROPs88
TMUs1632

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).

InterfacePCIe 2.0 x16PCIe 2.0 x8
Lengthno data145 mm
Widthno data1-slot
Supplementary power connectorsno dataNone

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 typeDDR3GDDR5
Maximum RAM amount1 GB1 GB
Memory bus width64 Bit64 Bit
Memory clock speed900 MHz1252 MHz
Memory bandwidth14.4 GB/s40.06 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 ConnectorsNo outputs1x DVI, 1x HDMI, 1x VGA
HDMI-+

API compatibility

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

DirectX12 (11_0)12 (11_0)
Shader Model5.15.1
OpenGL4.64.6
OpenCL1.11.2
VulkanN/A1.1.126
CUDA2.13.5

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary


Performance score 1.45 3.55
Recency 27 November 2013 29 May 2013
Power consumption (TDP) 15 Watt 49 Watt

GT 820M has an age advantage of 5 months, and 226.7% lower power consumption.

GT 640 Rev. 2, on the other hand, has a 144.8% higher aggregate performance score.

The GeForce GT 640 Rev. 2 is our recommended choice as it beats the GeForce GT 820M in performance tests.

Be aware that GeForce GT 820M is a notebook card while GeForce GT 640 Rev. 2 is a desktop 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 GT 820M
GeForce GT 820M
NVIDIA GeForce GT 640 Rev. 2
GeForce GT 640 Rev. 2

Comparisons with similar GPUs

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


3.3 114 votes

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3.9 26 votes

Rate GeForce GT 640 Rev. 2 on a scale of 1 to 5:

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Questions & comments

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