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Radeon HD 7850 vs Radeon R9 270X

Intro

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

Compare all that to the Radeon R9 270X, which comes with GPU core speed of 1000 MHz, and 2048 MB of GDDR5 RAM set to run at 1400 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 Texture Address Units, 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 270X 6590 points
Radeon HD 7850 5200 points
Difference: 1390 (27%)

Zcash Mining Hash Rate

Radeon R9 270X 177 Sol/s
Radeon HD 7850 171 Sol/s
Difference: 6 (4%)

Ethereum Mining Hash Rate

Radeon R9 270X 18 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 5 (38%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon R9 270X 180 Watts
Difference: 50 Watts (38%)

Memory Bandwidth

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

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

Texel Rate

The Radeon R9 270X is quite a bit (about 45%) faster with regards to anisotropic filtering than the Radeon HD 7850. (explain)

Radeon R9 270X 80000 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 24960 (45%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 270X is the winner, but it probably won't make a huge difference. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 4480 (16%)

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 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 7850 Radeon R9 270X
Manufacturer AMD AMD
Year March 2012 October 2013
Code Name Pitcairn Pro Curacao XT
Memory 2048 MB 2048 MB
Core Speed 860 MHz 1000 MHz
Memory Speed 4800 MHz 5600 MHz
Power (Max TDP) 130 watts 180 watts
Bandwidth 153600 MB/sec 179200 MB/sec
Texel Rate 55040 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 32000 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 max amount of data (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should 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 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 calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. 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 quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 7850

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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