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Radeon HD 6950 vs Radeon HD 7870


Intro

The Radeon HD 6950 comes with a core clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is made up of 1408 SPUs, 88 TAUs, and 32 ROPs.

Compare all that to the Radeon HD 7870, which features a clock frequency of 1000 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 TAUs, and 32 Raster Operation Units.

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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 7870 6230 points
Radeon HD 6950 3240 points
Difference: 2990 (92%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 175 Watts
Radeon HD 6950 200 Watts
Difference: 25 Watts (14%)

Memory Bandwidth

Theoretically, the Radeon HD 6950 should be a little bit faster than the Radeon HD 7870 overall. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 6400 (4%)

Texel Rate

The Radeon HD 7870 will be just a bit (more or less 14%) faster with regards to anisotropic filtering than the Radeon HD 6950. (explain)

Radeon HD 7870 80000 Mtexels/sec
Radeon HD 6950 70400 Mtexels/sec
Difference: 9600 (14%)

Pixel Rate

The Radeon HD 7870 should be much (more or less 25%) better at anti-aliasing than the Radeon HD 6950, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 7870 32000 Mpixels/sec
Radeon HD 6950 25600 Mpixels/sec
Difference: 6400 (25%)

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 6950

Amazon.com

Radeon HD 7870

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

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Model Radeon HD 6950 Radeon HD 7870
Manufacturer AMD AMD
Year December 2010 March 2012
Code Name Cayman Pro Pitcairn XT
Memory 1024 MB 2048 MB
Core Speed 800 MHz 1000 MHz
Memory Speed 5000 MHz 4800 MHz
Power (Max TDP) 200 watts 175 watts
Bandwidth 160000 MB/sec 153600 MB/sec
Texel Rate 70400 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 1408 1280
Texture Mapping Units 88 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video 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 most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 6950

Amazon.com

Radeon HD 7870

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.

Comments

6 Responses to “Radeon HD 6950 vs Radeon HD 7870”
Anonymous says:

the 7870 sapphire OC edition is better

MXM says:

but who are the best 6950 or 7870 ?! for gaming ?!?!?!

Marcel says:

The 6950 are 100x better !!!

Anonymous says:

Useless compare :/

saad says:

the hd 7870 is little bit better then hd 6950 and capable of handling games on full hd 1920x1080 screen resolution and much better than hd 6950

volga says:

the 6950 is a little bit fast than 7870 because of memory bandwith

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