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Radeon HD 6870 vs Radeon HD 6950

Intro

The Radeon HD 6870 comes with a GPU clock speed of 900 MHz, and the 1024 MB of GDDR5 RAM is set to run at 1050 MHz through a 256-bit bus. It also is made up of 1120 SPUs, 56 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 6950, which has core speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 1408 SPUs along with 88 TAUs 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 should perform a small bit faster than the Radeon HD 6870 overall. (explain)

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

Texel Rate

The Radeon HD 6950 will be much (more or less 40%) faster with regards to AF than the Radeon HD 6870. (explain)

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

Pixel Rate

The Radeon HD 6870 should be just a bit (about 13%) faster with regards to full screen anti-aliasing than the Radeon HD 6950, and should be able to handle higher screen resolutions without losing too much performance. (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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Radeon HD 6870

Amazon.com

Other US-based stores

Radeon HD 6950

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 6870 Radeon HD 6950
Manufacturer ATi ATi
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 (counted in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to 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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