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Radeon HD 6870 vs Radeon HD 6950

Intro

The Radeon HD 6870 uses a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory is set to run at a speed of 1050 MHz on this model. It features 1120 SPUs as well as 56 TAUs and 32 ROPs.

Compare those specifications to the Radeon HD 6950, which has core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 1408 SPUs as well as 88 Texture Address Units and 32 ROPs.

Battlefield Bad Company 2

Settings: Highest Settings
AA: 4x
AF: 16x
Resolution: 1920x1200
Test Machine: Intel Core i7 920(ES) @ 4.0Ghz (Turbo Mode Enabled) (Source)
Radeon HD 6950 50 FPS
Radeon HD 6870 44 FPS
Difference: 6 FPS (14%)

DiRT 2

Settings: Highest Details
AA: 4x
AF: none
Resolution: 1920x1200
Test Machine: Intel Core i7 920(ES) @ 4.0Ghz (Turbo Mode Enabled) (Source)
Radeon HD 6950 71 FPS
Radeon HD 6870 65 FPS
Difference: 6 FPS (9%)

Just Cause 2

Settings: Highest Settings
AA: 4x
AF: 16x
Resolution: 1920x1200
Test Machine: Intel Core i7 920(ES) @ 4.0Ghz (Turbo Mode Enabled) (Source)
Radeon HD 6950 54 FPS
Radeon HD 6870 48 FPS
Difference: 6 FPS (13%)

Radeon HD 6950 wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the Radeon HD 6950 wins overall, by 18 FPS. Please note that we do not have the results of every benchmark ever done for these cards, so the results may differ wildly in different games.

Radeon HD 6950 175 FPS
Radeon HD 6870 157 FPS
Difference: 18 FPS (11%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
Radeon HD 6950 200 Watts
Difference: 49 Watts (32%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 will be 19% quicker than the Radeon HD 6870 overall, because of its higher bandwidth. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 25600 (19%)

Texel Rate

The Radeon HD 6950 should be much (about 40%) better at AF than the Radeon HD 6870. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 20000 (40%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6870 is the winner, not by a very large margin though. (explain)

Radeon HD 6870 28800 Mpixels/sec
Radeon HD 6950 25600 Mpixels/sec
Difference: 3200 (13%)

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 6870

Amazon.com

Radeon HD 6950

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 6870 Radeon HD 6950
Manufacturer AMD AMD
Year October 2010 December 2010
Code Name Barts XT Cayman Pro
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe x16
Memory 1024 MB 1024 MB
Core Speed 900 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1050 MHz (4200 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 1120 1408
Texture Mapping Units 56 88
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) 151 watts 200 watts
Shader Model 5.0 5.0
Bandwidth 134400 MB/sec 160000 MB/sec
Texel Rate 50400 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 28800 Mpixels/sec 25600 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock 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 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 ability to reach the max fill rate.

Comments

5 Responses to “Radeon HD 6870 vs Radeon HD 6950”
[...] oder HD 6870 ? Im schnitt haste 18fps mehr, je nach spiel. Enstspricht in etwa 11%. Quelle:Radeon HD 6870 vs Radeon HD 6950 – Performance Comparison Benchmarks @ Hardware Compare Phenom II 955 3.2Ghz@Mugen 2 Rev.b/Asus M4A87TD EVO/ Corsair 8Gb DDR 3-1333/Sapphire HD [...]
[...] HD 6950 ($230 @newegg) About an $70 dollar price difference on newegg.com Here is a comparison: Radeon HD 6870 vs Radeon HD 6950 ? Performance Comparison Benchmarks @ Hardware Compare Here is the PassMark for the 6870: PassMark - Radeon HD 6870 - Price performance comparison And [...]
[...] doppio.... ma il monitor non avevi il full hd? puoi tenerlo se funziona il samsung Ma anche no Radeon HD 6870 vs Radeon HD 6950 – Performance Comparison Benchmarks @ Hardware Compare Rispondi [...]
pp965 says:
I have HIS HD 6950.
I really like it.
Koala says:
i have the Powercolor HD6950 fucking love the card

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