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Radeon R7 250X vs Radeon R9 M390X

Intro

The Radeon R7 250X has core speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Compare those specifications to the Radeon R9 M390X, which features a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 95 Watts
Radeon R9 M390X 125 Watts
Difference: 30 Watts (32%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should in theory be quite a bit superior to the Radeon R7 250X in general. (explain)

Radeon R9 M390X 160000 MB/sec
Radeon R7 250X 72000 MB/sec
Difference: 88000 (122%)

Texel Rate

The Radeon R9 M390X should be a lot (more or less 131%) faster with regards to texture filtering than the Radeon R7 250X. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon R7 250X 40000 Mtexels/sec
Difference: 52544 (131%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M390X is the winner, by a large margin. (explain)

Radeon R9 M390X 23136 Mpixels/sec
Radeon R7 250X 16000 Mpixels/sec
Difference: 7136 (45%)

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

Amazon.com

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Radeon R9 M390X

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 Radeon R9 M390X
Manufacturer AMD AMD
Year February 2014 2015
Code Name Cape Verde XT Tonga
Memory 1024 MB 4096 MB
Core Speed 1000 MHz 723 MHz
Memory Speed 4500 MHz 5000 MHz
Power (Max TDP) 95 watts 125 watts
Bandwidth 72000 MB/sec 160000 MB/sec
Texel Rate 40000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 640 2048
Texture Mapping Units 40 128
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 1500 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs 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 output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon R7 250X

Amazon.com

Check prices at:

Radeon R9 M390X

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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