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Radeon HD 6950 vs Radeon HD 7750

Intro

The Radeon HD 6950 comes with core speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 1408 SPUs along with 88 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 7750, which has a clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is comprised of 512 SPUs, 32 Texture Address Units, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 6950 200 Watts
Difference: 145 Watts (264%)

Memory Bandwidth

In theory, the Radeon HD 6950 is 122% quicker than the Radeon HD 7750 overall, because of its higher bandwidth. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 88000 (122%)

Texel Rate

The Radeon HD 6950 will be much (about 175%) better at anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 44800 (175%)

Pixel Rate

The Radeon HD 6950 should be quite a bit (more or less 100%) more effective at FSAA than the Radeon HD 7750, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 12800 (100%)

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 6950

Amazon.com

Other US-based stores

Radeon HD 7750

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 6950 Radeon HD 7750
Manufacturer ATi ATi
Year December 2010 February 2012
Code Name Cayman Pro Cape Verde Pro
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 800 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1250 MHz (5000 MHz effective) 1125 MHz (4500 MHz effective)
Unified Shaders 1408 512
Texture Mapping Units 88 32
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 200 watts 55 watts
Shader Model 5.0 5.0
Bandwidth 160000 MB/sec 72000 MB/sec
Texel Rate 70400 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 12800 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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