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GeForce 8800 GT 256MB vs Radeon HD 4750

Intro

The GeForce 8800 GT 256MB uses a 65 nm design. nVidia has clocked the core speed at 600 MHz. The GDDR3 memory works at a speed of 700 MHz on this model. It features 112 SPUs as well as 56 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 4750, which has GPU clock speed of 730 MHz, and 512 MB of GDDR5 memory running at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750 75 Watts
GeForce 8800 GT 256MB 105 Watts
Difference: 30 Watts (40%)

Memory Bandwidth

Performance-wise, the Radeon HD 4750 should in theory be just a bit superior to the GeForce 8800 GT 256MB overall. (explain)

Radeon HD 4750 51200 MB/sec
GeForce 8800 GT 256MB 44800 MB/sec
Difference: 6400 (14%)

Texel Rate

The GeForce 8800 GT 256MB should be much (more or less 44%) faster with regards to anisotropic filtering than the Radeon HD 4750. (explain)

GeForce 8800 GT 256MB 33600 Mtexels/sec
Radeon HD 4750 23360 Mtexels/sec
Difference: 10240 (44%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4750 is the winner, and very much so. (explain)

Radeon HD 4750 11680 Mpixels/sec
GeForce 8800 GT 256MB 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 256MB

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.

Specifications

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Model GeForce 8800 GT 256MB Radeon HD 4750
Manufacturer nVidia AMD
Year Dec 2007
Code Name G92 RV740
Memory 256 MB 512 MB
Core Speed 600 MHz 730 MHz
Memory Speed 1400 MHz 3200 MHz
Power (Max TDP) 105 watts 75 watts
Bandwidth 44800 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 largest amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out 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 is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GT 256MB

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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