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Radeon HD 7970 vs Radeon R7 250

Intro

The Radeon HD 7970 makes use of a 28 nm design. AMD has clocked the core frequency at 925 MHz. The GDDR5 RAM runs at a speed of 1375 MHz on this card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Compare that to the Radeon R7 250, which features GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM set to run at 1150 MHz through a 128-bit bus. It also is made up of 384 SPUs, 24 Texture Address Units, and 8 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 HD 7970 8225 points
Radeon R7 250 1836 points
Difference: 6389 (348%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
Radeon HD 7970 250 Watts
Difference: 185 Watts (285%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7970 should be 259% faster than the Radeon R7 250 in general, due to its greater data rate. (explain)

Radeon HD 7970 264000 MB/sec
Radeon R7 250 73600 MB/sec
Difference: 190400 (259%)

Texel Rate

The Radeon HD 7970 will be quite a bit (about 393%) better at texture filtering than the Radeon R7 250. (explain)

Radeon HD 7970 118400 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 94400 (393%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7970 is superior to the Radeon R7 250, by a large margin. (explain)

Radeon HD 7970 29600 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 21600 (270%)

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 HD 7970

Amazon.com

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Radeon R7 250

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 HD 7970 Radeon R7 250
Manufacturer AMD AMD
Year January 2012 October 2013
Code Name Tahiti XT Oland XT
Memory 3072 MB 1024 MB
Core Speed 925 MHz 1000 MHz
Memory Speed 5500 MHz 4600 MHz
Power (Max TDP) 250 watts 65 watts
Bandwidth 264000 MB/sec 73600 MB/sec
Texel Rate 118400 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 8000 Mpixels/sec
Unified Shaders 2048 384
Texture Mapping Units 128 24
Render Output Units 32 8
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 1040 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 7970

Amazon.com

Check prices at:

Radeon R7 250

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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