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Radeon HD 7750 vs Radeon HD 7950

Intro

The Radeon HD 7750 comes with core clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 7950, which uses a 28 nm design. ATi has clocked the core speed at 800 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this particular model. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 7950 200 Watts
Difference: 145 Watts (264%)

Memory Bandwidth

The Radeon HD 7950 should in theory perform a lot faster than the Radeon HD 7750 in general. (explain)

Radeon HD 7950 240000 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 168000 (233%)

Texel Rate

The Radeon HD 7950 should be quite a bit (approximately 250%) more effective at anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 7950 89600 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 64000 (250%)

Pixel Rate

The Radeon HD 7950 will be quite a bit (approximately 100%) better at full screen anti-aliasing than the Radeon HD 7750, and able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7950 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 7750

Amazon.com

Other US-based stores

Radeon HD 7950

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 7750 Radeon HD 7950
Manufacturer ATi ATi
Year February 2012 January 2012
Code Name Cape Verde Pro Tahiti Pro
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 1024 MB 1536 MB
Core Speed 800 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1125 MHz (4500 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 512 1792
Texture Mapping Units 32 112
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 384-bit
DirectX Version DirectX 11.1 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.2
Power (Max TDP) 55 watts 200 watts
Shader Model 5.0 5.0
Bandwidth 72000 MB/sec 240000 MB/sec
Texel Rate 25600 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 12800 Mpixels/sec 25600 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's 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 better the bandwidth is, 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per 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 sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

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