Radeon Sky 900 vs GeForce GT 640M LE

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Primary details

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

Place in the ranking918not rated
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation0.06no data
Power efficiency3.94no data
ArchitectureFermi (2010−2014)GCN 1.0 (2011−2020)
GPU code nameGF108Tahiti
Market segmentLaptopWorkstation
Release date4 May 2012 (12 years ago)27 March 2013 (11 years ago)
Launch price (MSRP)$849.99 no data

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 coresUp to 3843584
Core clock speedUp to 500 MHz825 MHz
Boost clock speedno data950 MHz
Number of transistors585 million4,313 million
Manufacturing process technology40 nm28 nm
Power consumption (TDP)20 Watt300 Watt
Texture fill rate12.05106.4
Floating-point processing power0.289 TFLOPS3.405 TFLOPS
ROPs432
TMUs16112

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).

Laptop sizemedium sizedno data
Bus supportPCI Express 2.0, PCI Express 3.0PCIe 3.0
InterfacePCIe 2.0 x16PCIe 3.0 x16
Lengthno data305 mm
Widthno data2-slot
Form factorno datafull height / full length
Supplementary power connectorsno data2x 8-pin

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 typeDDR3\DDR5GDDR5
Maximum RAM amount2 GB6 GB
Memory bus width128bit384 Bit
Memory clock speed785 MHz1250 MHz
Memory bandwidthUp to 28.8 GB/s480 GB/s
Shared memory--

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 mini-DisplayPort
HDMI+-
HDCP+-
Maximum VGA resolutionUp to 2048x1536no data
Dual-link DVI support-+

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray+-
Optimus+-

API compatibility

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

DirectX12 API12 (11_1)
Shader Model5.15.1
OpenGL4.54.6
OpenCL1.11.2
VulkanN/A1.2.131
CUDA+-

Pros & cons summary


Recency 4 May 2012 27 March 2013
Maximum RAM amount 2 GB 6 GB
Chip lithography 40 nm 28 nm
Power consumption (TDP) 20 Watt 300 Watt

GT 640M LE has 1400% lower power consumption.

Sky 900, on the other hand, has an age advantage of 10 months, a 200% higher maximum VRAM amount, and a 42.9% more advanced lithography process.

We couldn't decide between GeForce GT 640M LE and Radeon Sky 900. We've got no test results to judge.

Be aware that GeForce GT 640M LE is a notebook card while Radeon Sky 900 is a workstation one.


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

Vote for your favorite

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NVIDIA GeForce GT 640M LE
GeForce GT 640M LE
AMD Radeon Sky 900
Radeon Sky 900

Comparisons with similar GPUs

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Community ratings

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3.3 58 votes

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Questions & comments

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