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GeForce 8800 GTS (G80) 320MB vs Radeon HD 4750

Intro

The GeForce 8800 GTS (G80) 320MB makes use of a 90 nm design. nVidia has clocked the core speed at 513 MHz. The GDDR3 memory runs at a speed of 792 MHz on this particular card. It features 96 SPUs as well as 48 Texture Address Units and 20 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4750, which has core clock speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750 75 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 68 Watts (91%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GTS (G80) 320MB should theoretically be much better than the Radeon HD 4750 overall. (explain)

GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 12160 (24%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB will be a little bit (approximately 5%) better at AF than the Radeon HD 4750. (explain)

GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Radeon HD 4750 23360 Mtexels/sec
Difference: 1264 (5%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4750 is a better choice, but not by far. (explain)

Radeon HD 4750 11680 Mpixels/sec
GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Difference: 1420 (14%)

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 GTS (G80) 320MB

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 GTS (G80) 320MB Radeon HD 4750
Manufacturer nVidia AMD
Year Feb 2007
Code Name G80 RV740
Memory 320 MB 512 MB
Core Speed 513 MHz 730 MHz
Memory Speed 1584 MHz 3200 MHz
Power (Max TDP) 143 watts 75 watts
Bandwidth 63360 MB/sec 51200 MB/sec
Texel Rate 24624 Mtexels/sec 23360 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 11680 Mpixels/sec
Unified Shaders 96 640(128x5)
Texture Mapping Units 48 32
Render Output Units 20 16
Bus Type GDDR3 GDDR5
Bus Width 320-bit 128-bit
Fab Process 90 nm 40 nm
Transistors 681 million 826 million
Bus PCIe x16 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 data (counted in megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it must 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 320MB

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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