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GeForce 8800 GT 512MB vs Radeon HD 4750

Intro

The GeForce 8800 GT 512MB makes use of a 65 nm design. nVidia has set the core speed at 600 MHz. The GDDR3 RAM runs at a speed of 900 MHz on this specific card. It features 112 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 4750, which comes with core speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750 75 Watts
GeForce 8800 GT 512MB 105 Watts
Difference: 30 Watts (40%)

Memory Bandwidth

In theory, the GeForce 8800 GT 512MB should be 13% faster than the Radeon HD 4750 in general, due to its greater bandwidth. (explain)

GeForce 8800 GT 512MB 57600 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 6400 (13%)

Texel Rate

The GeForce 8800 GT 512MB will be a lot (about 44%) better at anisotropic filtering than the Radeon HD 4750. (explain)

GeForce 8800 GT 512MB 33600 Mtexels/sec
Radeon HD 4750 23360 Mtexels/sec
Difference: 10240 (44%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4750 is superior to the GeForce 8800 GT 512MB, by far. (explain)

Radeon HD 4750 11680 Mpixels/sec
GeForce 8800 GT 512MB 9600 Mpixels/sec
Difference: 2080 (22%)

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 GT 512MB

Amazon.com

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Radeon HD 4750

Amazon.com

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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 GT 512MB Radeon HD 4750
Manufacturer nVidia AMD
Year Oct 2007
Code Name G92 RV740
Memory 512 MB 512 MB
Core Speed 600 MHz 730 MHz
Memory Speed 1800 MHz 3200 MHz
Power (Max TDP) 105 watts 75 watts
Bandwidth 57600 MB/sec 51200 MB/sec
Texel Rate 33600 Mtexels/sec 23360 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 11680 Mpixels/sec
Unified Shaders 112 640(128x5)
Texture Mapping Units 56 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 826 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core 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 processed per second.

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

Display Prices

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GeForce 8800 GT 512MB

Amazon.com

Check prices at:

Radeon HD 4750

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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