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Radeon HD 7850 vs Radeon R9 270X

Intro

The Radeon HD 7850 comes with core clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

Compare that to the Radeon R9 270X, which comes with a clock frequency of 1000 MHz and a GDDR5 memory speed of 1400 MHz. It also features a 256-bit memory bus, and makes use of 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 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

Performance-wise, the Radeon R9 270X should in theory be a bit superior to the Radeon HD 7850 overall. (explain)

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

Texel Rate

The Radeon R9 270X will be a lot (more or less 45%) faster with regards to AF than the Radeon HD 7850. (explain)

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

Pixel Rate

The Radeon R9 270X should be a bit (about 16%) faster with regards to full screen anti-aliasing than the Radeon HD 7850, and able to handle higher screen resolutions better. (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 maximum amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount 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 this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to 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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