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Radeon R7 250X vs Radeon R9 M275X

Intro

The Radeon R7 250X uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this particular card. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon R9 M275X, which has a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X 50 Watts
Radeon R7 250X 95 Watts
Difference: 45 Watts (90%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so in theory they should have identical performance. (explain)

Texel Rate

The Radeon R7 250X should be just a bit (more or less 11%) better at texture filtering than the Radeon R9 M275X. (explain)

Radeon R7 250X 40000 Mtexels/sec
Radeon R9 M275X 36000 Mtexels/sec
Difference: 4000 (11%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 250X is the winner, not by a very large margin though. (explain)

Radeon R7 250X 16000 Mpixels/sec
Radeon R9 M275X 14400 Mpixels/sec
Difference: 1600 (11%)

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

Check prices at:

Radeon R9 M275X

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.

Specifications

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Model Radeon R7 250X Radeon R9 M275X
Manufacturer AMD AMD
Year February 2014 May 1 2014
Code Name Cape Verde XT Venus XTX
Memory 1024 MB 2048 MB
Core Speed 1000 MHz 900 MHz
Memory Speed 4500 MHz 4500 MHz
Power (Max TDP) 95 watts 50 watts
Bandwidth 72000 MB/sec 72000 MB/sec
Texel Rate 40000 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 640 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-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 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon R7 250X

Amazon.com

Check prices at:

Radeon R9 M275X

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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