Join Us On Facebook

Compare any two graphics cards:
VS

Radeon HD 7850 vs Radeon R9 280X

Intro

The Radeon HD 7850 features a core clock speed of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

Compare all that to the Radeon R9 280X, which features a core clock frequency of 850 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 384-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon R9 280X 250 Watts
Difference: 120 Watts (92%)

Memory Bandwidth

In theory, the Radeon R9 280X is 88% faster than the Radeon HD 7850 in general, due to its greater data rate. (explain)

Radeon R9 280X 288000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 134400 (88%)

Texel Rate

The Radeon R9 280X will be quite a bit (more or less 98%) faster with regards to AF than the Radeon HD 7850. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 53760 (98%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7850 is the winner, but not by far. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon R9 280X 27200 Mpixels/sec
Difference: 320 (1%)

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

Radeon HD 7850

Amazon.com

Radeon R9 280X

Amazon.com

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

Model Radeon HD 7850 Radeon R9 280X
Manufacturer AMD AMD
Year March 2012 October 2013
Code Name Pitcairn Pro Tahiti XTL
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 3072 MB
Core Speed 860 MHz 850 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1200 MHz (4800 MHz effective) 1500 MHz (6000 MHz effective)
Unified Shaders 1024 2048
Texture Mapping Units 64 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3
Power (Max TDP) 130 watts 250 watts
Shader Model 5.0 5.0
Bandwidth 153600 MB/sec 288000 MB/sec
Texel Rate 55040 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 27200 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Comments

Be the first to leave a comment!

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

WP-SpamFree by Pole Position Marketing