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Radeon R7 250X vs Radeon R9 285

Intro

The Radeon R7 250X comes with clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

Compare all that to the Radeon R9 285, which uses a 28 nm design. AMD has clocked the core speed at 918 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this specific model. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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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 R9 285 8500 points
Radeon R7 250X 2860 points
Difference: 5640 (197%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 95 Watts
Radeon R9 285 190 Watts
Difference: 95 Watts (100%)

Memory Bandwidth

As far as performance goes, the Radeon R9 285 should theoretically be a lot superior to the Radeon R7 250X overall. (explain)

Radeon R9 285 176000 MB/sec
Radeon R7 250X 72000 MB/sec
Difference: 104000 (144%)

Texel Rate

The Radeon R9 285 should be much (about 157%) faster with regards to texture filtering than the Radeon R7 250X. (explain)

Radeon R9 285 102816 Mtexels/sec
Radeon R7 250X 40000 Mtexels/sec
Difference: 62816 (157%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 285 is a better choice, by far. (explain)

Radeon R9 285 29376 Mpixels/sec
Radeon R7 250X 16000 Mpixels/sec
Difference: 13376 (84%)

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 285

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 285
Manufacturer AMD AMD
Year February 2014 September 2014
Code Name Cape Verde XT Tonga PRO
Memory 1024 MB 2048 MB
Core Speed 1000 MHz 918 MHz
Memory Speed 4500 MHz 5500 MHz
Power (Max TDP) 95 watts 190 watts
Bandwidth 72000 MB/sec 176000 MB/sec
Texel Rate 40000 Mtexels/sec 102816 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 29376 Mpixels/sec
Unified Shaders 640 1792
Texture Mapping Units 40 112
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 1500 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.4

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen 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 texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. 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 also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon R7 250X

Amazon.com

Check prices at:

Radeon R9 285

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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