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Radeon HD 6950 vs Radeon HD 7750

Intro

The Radeon HD 6950 has a GPU core clock speed of 800 MHz, and the 1024 MB of GDDR5 memory is set to run at 1250 MHz through a 256-bit bus. It also features 1408 Stream Processors, 88 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon HD 7750, which has GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is comprised of 512 Stream Processors, 32 TAUs, and 16 ROPs.

Display Graphs

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(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

Performance-wise, the Radeon HD 6950 should theoretically be quite a bit better than the Radeon HD 7750 in general. (explain)

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

Texel Rate

The Radeon HD 6950 should be quite a bit (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 a lot (more or less 100%) better at FSAA than the Radeon HD 7750, and also capable of handling higher 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

Display Prices

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Radeon HD 6950

Amazon.com

Radeon HD 7750

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 7750
Manufacturer AMD AMD
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 5000 MHz 4500 MHz
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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units by the core clock 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 maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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