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Radeon HD 7850 vs Radeon R9 270

Intro

The Radeon HD 7850 makes use of a 28 nm design. AMD has set the core frequency at 860 MHz. The GDDR5 RAM runs at a frequency of 1200 MHz on this particular card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon R9 270, which comes with GPU core speed of 900 MHz, and 2048 MB of GDDR5 RAM running at 1400 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 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 R9 270 5943 points
Radeon HD 7850 5200 points
Difference: 743 (14%)

Ethereum Mining Hash Rate

Radeon R9 270 15 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 2 (15%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon R9 270 150 Watts
Difference: 20 Watts (15%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 will be 17% faster than the Radeon HD 7850 overall, due to its higher bandwidth. (explain)

Radeon R9 270 179200 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 25600 (17%)

Texel Rate

The Radeon R9 270 should be much (approximately 31%) more effective at AF than the Radeon HD 7850. (explain)

Radeon R9 270 72000 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 16960 (31%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 270 is a better choice, but not by far. (explain)

Radeon R9 270 28800 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 1280 (5%)

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 7850

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.

Specifications

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Model Radeon HD 7850 Radeon R9 270
Manufacturer AMD AMD
Year March 2012 November 2013
Code Name Pitcairn Pro Curacao Pro
Memory 2048 MB 2048 MB
Core Speed 860 MHz 900 MHz
Memory Speed 4800 MHz 5600 MHz
Power (Max TDP) 130 watts 150 watts
Bandwidth 153600 MB/sec 179200 MB/sec
Texel Rate 55040 Mtexels/sec 72000 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 1024 1280
Texture Mapping Units 64 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 largest amount of data (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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

Display Prices

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Radeon HD 7850

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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