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Radeon HD 6870 vs Radeon HD 6950

Intro

The Radeon HD 6870 features a core clock speed of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It features 1120 SPUs, 56 TAUs, and 32 ROPs.

Compare that to the Radeon HD 6950, which uses a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 memory is set to run at a frequency of 1250 MHz on this particular card. It features 1408 SPUs along with 88 TAUs and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6950 3240 points
Radeon HD 6870 2870 points
Difference: 370 (13%)

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

The Radeon HD 6950, in theory, should be a 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 is much (approximately 40%) more effective at texture filtering than the Radeon HD 6870. (explain)

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

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6870 is a better choice, 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

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Radeon HD 6870

Amazon.com

Check prices at:

Radeon HD 6950

Amazon.com

Check prices at:

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

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Model Radeon HD 6870 Radeon HD 6950
Manufacturer AMD AMD
Year October 2010 December 2010
Code Name Barts XT Cayman Pro
Memory 1024 MB 1024 MB
Core Speed 900 MHz 800 MHz
Memory Speed 4200 MHz 5000 MHz
Power (Max TDP) 151 watts 200 watts
Bandwidth 134400 MB/sec 160000 MB/sec
Texel Rate 50400 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 28800 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1120 1408
Texture Mapping Units 56 88
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1700 million 2640 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 6870

Amazon.com

Check prices at:

Radeon HD 6950

Amazon.com

Check prices at:

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.

Comments

5 Responses to “Radeon HD 6870 vs Radeon HD 6950”
HD 6950 oder HD 6870 ? says:

[...] 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 [...]

Help me with my build!!! ;) - Project Reality Forums says:

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PC GAMING 550 EURO says:

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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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