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Radeon HD 7850 vs Radeon R9 290


The Radeon HD 7850 comes with a clock frequency of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon R9 290, which has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2560 SPUs as well as 160 Texture Address Units and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon R9 290 300 Watts
Difference: 170 Watts (131%)

Memory Bandwidth

The Radeon R9 290, in theory, should perform quite a bit faster than the Radeon HD 7850 in general. (explain)

Radeon R9 290 320000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 166400 (108%)

Texel Rate

The Radeon R9 290 is quite a bit (approximately 133%) faster with regards to texture filtering than the Radeon HD 7850. (explain)

Radeon R9 290 128000 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 72960 (133%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 290 is superior to the Radeon HD 7850, by a large margin. (explain)

Radeon R9 290 51200 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 23680 (86%)

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

Radeon R9 290

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.


Display Specifications

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Model Radeon HD 7850 Radeon R9 290
Manufacturer AMD AMD
Year March 2012 November 2013
Code Name Pitcairn Pro Hawaii PRO
Memory 2048 MB 4096 MB
Core Speed 860 MHz 800 MHz
Memory Speed 4800 MHz 5000 MHz
Power (Max TDP) 130 watts 300 watts
Bandwidth 153600 MB/sec 320000 MB/sec
Texel Rate 55040 Mtexels/sec 128000 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 51200 Mpixels/sec
Unified Shaders 1024 2560
Texture Mapping Units 64 160
Render Output Units 32 64
Bus Type GDDR5 GDDR5
Bus Width 256-bit 512-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 6200 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: Bandwidth is the largest amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 applied in one second. This is calculated by multiplying the total number of texture units 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.


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