GeForce GT 645 OEM vs Radeon R6 M255DX

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Primary details

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

Place in the ranking967not rated
Place by popularitynot in top-100not in top-100
ArchitectureGCN 1.0 (2011−2020)Fermi 2.0 (2010−2014)
GPU code nameJetGF114
Market segmentLaptopDesktop
Release date7 January 2014 (10 years ago)24 April 2012 (12 years ago)

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 cores320288
Core clock speed780 MHz776 MHz
Boost clock speed855 MHzno data
Number of transistors690 million1,950 million
Manufacturing process technology28 nm40 nm
Power consumption (TDP)no data102 Watt
Texture fill rate17.1037.25
Floating-point processing power0.5472 TFLOPS0.894 TFLOPS
ROPs824
TMUs2048

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
InterfaceIGPPCIe 2.0 x16
Lengthno data210 mm
Widthno data2-slot

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 typeSystem SharedGDDR5
Maximum RAM amountSystem Shared1 GB
Memory bus widthSystem Shared192 Bit
Memory clock speedSystem Shared957 MHz
Memory bandwidthno data91.87 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 outputs2x DVI, 1x mini-HDMI
Eyefinity+-
HDMI-+

Supported technologies

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

AppAcceleration+-

API compatibility

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

DirectX12 (11_1)12 (11_0)
Shader Model5.15.1
OpenGL4.64.6
OpenCL1.21.1
Vulkan1.2.131N/A
CUDA-2.1

Pros & cons summary


Recency 7 January 2014 24 April 2012
Chip lithography 28 nm 40 nm

R6 M255DX has an age advantage of 1 year, and a 42.9% more advanced lithography process.

We couldn't decide between Radeon R6 M255DX and GeForce GT 645 OEM. We've got no test results to judge.

Be aware that Radeon R6 M255DX is a notebook card while GeForce GT 645 OEM 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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AMD Radeon R6 M255DX
Radeon R6 M255DX
NVIDIA GeForce GT 645 OEM
GeForce GT 645 OEM

Comparisons with similar GPUs

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Community ratings

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2.8 16 votes

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Questions & comments

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