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Radeon HD 7870 XT vs Radeon R9 270X

Intro

The Radeon HD 7870 XT uses a 28 nm design. AMD has set the core frequency at 925 MHz. The GDDR5 memory works at a speed of 1500 MHz on this model. It features 1536 SPUs as well as 96 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon R9 270X, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory runs at a frequency of 1400 MHz on this specific model. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator 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 R9 270X 6590 points
Radeon HD 7870 XT 6390 points
Difference: 200 (3%)

Ethereum Mining Hash Rate

Radeon R9 270X 18 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 3 (20%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X 180 Watts
Radeon HD 7870 XT 185 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically, the Radeon HD 7870 XT should be just a bit faster than the Radeon R9 270X overall. (explain)

Radeon HD 7870 XT 192000 MB/sec
Radeon R9 270X 179200 MB/sec
Difference: 12800 (7%)

Texel Rate

The Radeon HD 7870 XT will be a bit (approximately 11%) faster with regards to texture filtering than the Radeon R9 270X. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
Radeon R9 270X 80000 Mtexels/sec
Difference: 8800 (11%)

Pixel Rate

The Radeon R9 270X should be a bit (approximately 8%) more effective at full screen anti-aliasing than the Radeon HD 7870 XT, and also should be able to handle higher resolutions better. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 2400 (8%)

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 7870 XT

Amazon.com

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Radeon R9 270X

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 7870 XT Radeon R9 270X
Manufacturer AMD AMD
Year November 2012 October 2013
Code Name Tahiti LE Curacao XT
Memory 2048 MB 2048 MB
Core Speed 925 MHz 1000 MHz
Memory Speed 6000 MHz 5600 MHz
Power (Max TDP) 185 watts 180 watts
Bandwidth 192000 MB/sec 179200 MB/sec
Texel Rate 88800 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 1536 1280
Texture Mapping Units 96 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 2800 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This 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 graphics 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 that the graphics card could possibly write 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 card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon R9 270X

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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