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Radeon R7 250X 2GB vs Radeon R9 Nano

Intro

The Radeon R7 250X 2GB has a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon R9 Nano, which comes with clock speeds of 1000 MHz on the GPU, and 500 MHz on the 4096 MB of HBM RAM. It features 4096 SPUs along with 256 Texture Address Units and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB 95 Watts
Radeon R9 Nano 175 Watts
Difference: 80 Watts (84%)

Memory Bandwidth

Performance-wise, the Radeon R9 Nano should theoretically be quite a bit superior to the Radeon R7 250X 2GB overall. (explain)

Radeon R9 Nano 512000 MB/sec
Radeon R7 250X 2GB 72000 MB/sec
Difference: 440000 (611%)

Texel Rate

The Radeon R9 Nano should be a lot (approximately 540%) faster with regards to anisotropic filtering than the Radeon R7 250X 2GB. (explain)

Radeon R9 Nano 256000 Mtexels/sec
Radeon R7 250X 2GB 40000 Mtexels/sec
Difference: 216000 (540%)

Pixel Rate

The Radeon R9 Nano will be a lot (more or less 300%) faster with regards to anti-aliasing than the Radeon R7 250X 2GB, and able to handle higher screen resolutions more effectively. (explain)

Radeon R9 Nano 64000 Mpixels/sec
Radeon R7 250X 2GB 16000 Mpixels/sec
Difference: 48000 (300%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon R7 250X 2GB

Amazon.com

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Radeon R9 Nano

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon R7 250X 2GB Radeon R9 Nano
Manufacturer AMD AMD
Year February 2014 September 2015
Code Name Cape Verde XT Fiji XT
Memory 2048 MB 4096 MB
Core Speed 1000 MHz 1000 MHz
Memory Speed 4500 MHz 500 MHz
Power (Max TDP) 95 watts 175 watts
Bandwidth 72000 MB/sec 512000 MB/sec
Texel Rate 40000 Mtexels/sec 256000 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 640 4096
Texture Mapping Units 40 256
Render Output Units 16 64
Bus Type GDDR5 HBM
Bus Width 128-bit 4096-bit
Fab Process 28 nm 28 nm
Transistors 1500 million 8900 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon R7 250X 2GB

Amazon.com

Check prices at:

Radeon R9 Nano

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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