Radeon R9 255 OEM vs Quadro K420

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Primary details

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

Place in the ranking906not rated
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation0.08no data
Power efficiency3.21no data
ArchitectureKepler (2012−2018)GCN 1.0 (2011−2020)
GPU code nameGK107Cape Verde
Market segmentWorkstationDesktop
Release date22 July 2014 (10 years ago)21 December 2013 (11 years ago)
Launch price (MSRP)$96.67 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 cores192512
Core clock speed876 MHz900 MHz
Boost clock speedno data930 MHz
Number of transistors1,270 million1,500 million
Manufacturing process technology28 nm28 nm
Power consumption (TDP)41 Watt65 Watt
Texture fill rate14.0229.76
Floating-point processing power0.3364 TFLOPS0.9523 TFLOPS
ROPs1616
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 3.0 x16
Length160 mmno data
Width1" (2.5 cm)2-slot
Supplementary power connectorsNone1x 6-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 type128 BitGDDR5
Maximum RAM amount1 GB/2 GB2 GB
Memory bus width128 Bit128 Bit
Memory clock speed891 MHz1150 MHz
Memory bandwidthUp to 29 GB/s73.6 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 Connectors1x DVI, 1x DisplayPortNo outputs
Number of simultaneous displays4no data

Supported technologies

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

3D Vision Pro+no data
Mosaic+no data
nView Desktop Management+no data

API compatibility

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

DirectX1212 (11_1)
Shader Model5.15.1
OpenGL4.54.6
OpenCL1.21.2
Vulkan1.1.1261.2.131
CUDA3.0-

Pros & cons summary


Recency 22 July 2014 21 December 2013
Maximum RAM amount 1 GB/2 GB 2 GB
Power consumption (TDP) 41 Watt 65 Watt

Quadro K420 has an age advantage of 7 months, and 58.5% lower power consumption.

R9 255 OEM, on the other hand, has a 100% higher maximum VRAM amount.

We couldn't decide between Quadro K420 and Radeon R9 255 OEM. We've got no test results to judge.

Be aware that Quadro K420 is a workstation graphics card while Radeon R9 255 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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NVIDIA Quadro K420
Quadro K420
AMD Radeon R9 255 OEM
Radeon R9 255 OEM

Comparisons with similar GPUs

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Community ratings

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3.5
143 votes

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Questions & comments

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