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Radeon HD 7870 vs Radeon R9 270

Intro

The Radeon HD 7870 has a GPU clock speed of 1000 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1200 MHz through a 256-bit bus. It also is made up of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon R9 270, which has a core clock speed of 900 MHz and a GDDR5 memory speed of 1400 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 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 HD 7870 6230 points
Radeon R9 270 5943 points
Difference: 287 (5%)

Ethereum Mining Hash Rate

Radeon HD 7870 16 Mh/s
Radeon R9 270 15 Mh/s
Difference: 1 (7%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270 150 Watts
Radeon HD 7870 175 Watts
Difference: 25 Watts (17%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 should be 17% faster than the Radeon HD 7870 in general, due to its greater bandwidth. (explain)

Radeon R9 270 179200 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 25600 (17%)

Texel Rate

The Radeon HD 7870 should be just a bit (more or less 11%) better at anisotropic filtering than the Radeon R9 270. (explain)

Radeon HD 7870 80000 Mtexels/sec
Radeon R9 270 72000 Mtexels/sec
Difference: 8000 (11%)

Pixel Rate

The Radeon HD 7870 should be a bit (approximately 11%) faster with regards to anti-aliasing than the Radeon R9 270, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7870 32000 Mpixels/sec
Radeon R9 270 28800 Mpixels/sec
Difference: 3200 (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 HD 7870

Amazon.com

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Radeon R9 270

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 Radeon R9 270
Manufacturer AMD AMD
Year March 2012 November 2013
Code Name Pitcairn XT Curacao Pro
Memory 2048 MB 2048 MB
Core Speed 1000 MHz 900 MHz
Memory Speed 4800 MHz 5600 MHz
Power (Max TDP) 175 watts 150 watts
Bandwidth 153600 MB/sec 179200 MB/sec
Texel Rate 80000 Mtexels/sec 72000 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 1280 1280
Texture Mapping Units 80 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 2800 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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 - 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

Amazon.com

Check prices at:

Radeon R9 270

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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