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GeForce 8800 GTX vs Radeon HD 7750

Intro

The GeForce 8800 GTX comes with a clock speed of 575 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 384-bit bus, and uses a 90 nm design. It is comprised of 128 SPUs, 64 TAUs, and 24 Raster Operation Units.

Compare all of that to the Radeon HD 7750, which comes with a core clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 512 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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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

In theory, the GeForce 8800 GTX will be 20% quicker than the Radeon HD 7750 in general, due to its greater data rate. (explain)

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

Texel Rate

The GeForce 8800 GTX is quite a bit (approximately 44%) better 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 lots of anti-aliasing is important to you, then the GeForce 8800 GTX is superior to the Radeon HD 7750, but only just. (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 largest amount of data (counted in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If 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 processed in one second. This is calculated by multiplying the total number of texture units of the card 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 applied per second.

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

Display Prices

Hide Prices

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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