Radeon 660M vs GeForce GT 420 OEM

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Primary details

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

Place in the rankingnot rated332
Place by popularitynot in top-100not in top-100
Power efficiencyno data27.94
ArchitectureFermi (2010−2014)RDNA 2.0 (2020−2024)
GPU code nameGF108Rembrandt+
Market segmentDesktopLaptop
Release date3 September 2010 (14 years ago)3 January 2023 (1 year 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 cores48384
Core clock speed700 MHz1500 MHz
Boost clock speedno data1900 MHz
Number of transistors585 million13,100 million
Manufacturing process technology40 nm6 nm
Power consumption (TDP)50 Watt40 Watt
Texture fill rate2.80045.60
Floating-point processing power0.1344 TFLOPS1.459 TFLOPS
ROPs416
TMUs424
Ray Tracing Coresno data6

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 4.0 x8
Length145 mmno data
Width1-slotno data
Supplementary power connectorsNoneNone

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 typeDDR3System Shared
Maximum RAM amount1 GBSystem Shared
Memory bus width128 BitSystem Shared
Memory clock speed900 MHzSystem Shared
Memory bandwidth28.8 GB/sno data
Shared memoryno data+

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 Connectors1x DVI, 1x HDMI, 1x VGAPortable Device Dependent
HDMI+-

API compatibility

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

DirectX12 (11_0)12 Ultimate (12_2)
Shader Model5.16.7
OpenGL4.64.6
OpenCL1.12.0
VulkanN/A1.3
CUDA2.1-

Pros & cons summary


Recency 3 September 2010 3 January 2023
Chip lithography 40 nm 6 nm
Power consumption (TDP) 50 Watt 40 Watt

Radeon 660M has an age advantage of 12 years, a 566.7% more advanced lithography process, and 25% lower power consumption.

We couldn't decide between GeForce GT 420 OEM and Radeon 660M. We've got no test results to judge.

Be aware that GeForce GT 420 OEM is a desktop card while Radeon 660M 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 GT 420 OEM
GeForce GT 420 OEM
AMD Radeon 660M
Radeon 660M

Comparisons with similar GPUs

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Community ratings

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3.7 181 vote

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Questions & comments

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