Join Us On Facebook

Compare any two graphics cards:
VS

Radeon HD 6850 vs Radeon HD 6870

Intro

The Radeon HD 6850 features a GPU core clock speed of 775 MHz, and the 1024 MB of GDDR5 memory is set to run at 1000 MHz through a 256-bit bus. It also is comprised of 960 Stream Processors, 48 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon HD 6870, which comes with a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 1120 SPUs, 56 Texture Address Units, and 32 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
Radeon HD 6870 151 Watts
Difference: 24 Watts (19%)

Memory Bandwidth

In theory, the Radeon HD 6870 should be 5% faster than the Radeon HD 6850 overall, because of its higher bandwidth. (explain)

Radeon HD 6870 134400 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 6400 (5%)

Texel Rate

The Radeon HD 6870 will be much (approximately 35%) more effective at AF than the Radeon HD 6850. (explain)

Radeon HD 6870 50400 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 13200 (35%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6870 is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 6870 28800 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 4000 (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

Radeon HD 6850

Amazon.com

Radeon HD 6870

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 6850 Radeon HD 6870
Manufacturer AMD AMD
Year October 2010 October 2010
Code Name Barts Pro Barts XT
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe x16
Memory 1024 MB 1024 MB
Core Speed 775 MHz 900 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1000 MHz (4000 MHz effective) 1050 MHz (4200 MHz effective)
Unified Shaders 960 1120
Texture Mapping Units 48 56
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 127 watts 151 watts
Shader Model 5.0 5.0
Bandwidth 128000 MB/sec 134400 MB/sec
Texel Rate 37200 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 24800 Mpixels/sec 28800 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). 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 reach the max fill rate.

Comments

One Response to “Radeon HD 6850 vs Radeon HD 6870”
[...] Radeon HD 6850 vs Radeon HD 6870 – Performance Comparison Benchmarks @ Hardware Compare __________________ a gugno...AsRock Z68 Extreme4 / 1600MHz 8GB G.Skill Ripjaws-X CL8 / i5-2500k 3,3GHz @ 4,6-5GHz / Noctua NH-U12P SE2 / GTX 570 Phantom SOC / Corsair HX750 / CM Elite 430 / x2 320Gb Spinpoint F4 raid0 / LG Masterizzatore BD-DVD / [...]

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>

Spam Protection by WP-SpamFree