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Radeon R7 250X vs Radeon RX 580

Intro

The Radeon R7 250X features a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Compare all that to the Radeon RX 580, which comes with GPU clock speed of 1257 MHz, and 8192 MB of GDDR5 RAM set to run at 2000 MHz through a 256-bit bus. It also is comprised of 2304 SPUs, 144 TAUs, and 32 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 580 13630 points
Radeon R7 250X 2860 points
Difference: 10770 (377%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 95 Watts
Radeon RX 580 185 Watts
Difference: 90 Watts (95%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 580 should perform much faster than the Radeon R7 250X overall. (explain)

Radeon RX 580 262144 MB/sec
Radeon R7 250X 72000 MB/sec
Difference: 190144 (264%)

Texel Rate

The Radeon RX 580 is quite a bit (about 353%) more effective at anisotropic filtering than the Radeon R7 250X. (explain)

Radeon RX 580 181008 Mtexels/sec
Radeon R7 250X 40000 Mtexels/sec
Difference: 141008 (353%)

Pixel Rate

The Radeon RX 580 should be a lot (about 151%) faster with regards to anti-aliasing than the Radeon R7 250X, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 580 40224 Mpixels/sec
Radeon R7 250X 16000 Mpixels/sec
Difference: 24224 (151%)

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 RX 580

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 RX 580
Manufacturer AMD AMD
Year February 2014 April 2017
Code Name Cape Verde XT Polaris 20
Memory 1024 MB 8192 MB
Core Speed 1000 MHz 1257 MHz
Memory Speed 4500 MHz 8000 MHz
Power (Max TDP) 95 watts 185 watts
Bandwidth 72000 MB/sec 262144 MB/sec
Texel Rate 40000 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 640 2304
Texture Mapping Units 40 144
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 1500 million 5700 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 max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon R7 250X

Amazon.com

Check prices at:

Radeon RX 580

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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