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GeForce 8800 GTX vs Radeon HD 7750

Intro

The GeForce 8800 GTX uses a 90 nm design. nVidia has set the core speed at 575 MHz. The GDDR3 memory works at a speed of 900 MHz on this specific model. It features 128 SPUs along with 64 Texture Address Units and 24 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7750, which makes use of a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1125 MHz on this model. It features 512 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
GeForce 8800 GTX 155 Watts
Difference: 100 Watts (182%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTX is 20% faster than the Radeon HD 7750 in general, due to its higher data rate. (explain)

GeForce 8800 GTX 86400 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 14400 (20%)

Texel Rate

The GeForce 8800 GTX should be much (approximately 44%) more effective at AF than the Radeon HD 7750. (explain)

GeForce 8800 GTX 36800 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 11200 (44%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 8800 GTX is the winner, not by a very large margin though. (explain)

GeForce 8800 GTX 13800 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 1000 (8%)

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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GeForce 8800 GTX

Amazon.com

Check prices at:

Radeon HD 7750

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 GeForce 8800 GTX Radeon HD 7750
Manufacturer nVidia AMD
Year Nov 2006 February 2012
Code Name G80 Cape Verde Pro
Memory 768 MB 1024 MB
Core Speed 575 MHz 800 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 155 watts 55 watts
Bandwidth 86400 MB/sec 72000 MB/sec
Texel Rate 36800 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 128 512
Texture Mapping Units 64 32
Render Output Units 24 16
Bus Type GDDR3 GDDR5
Bus Width 384-bit 128-bit
Fab Process 90 nm 28 nm
Transistors 681 million 1500 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 8800 GTX

Amazon.com

Check prices at:

Radeon HD 7750

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.

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