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GeForce 8800 GTS (G80) 640MB vs Radeon HD 4770

Intro

The GeForce 8800 GTS (G80) 640MB comes with a GPU clock speed of 513 MHz, and the 640 MB of GDDR3 memory runs at 792 MHz through a 320-bit bus. It also is comprised of 96 SPUs, 48 TAUs, and 20 ROPs.

Compare all that to the Radeon HD 4770, which has core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770 80 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 63 Watts (79%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G80) 640MB should be 24% faster than the Radeon HD 4770 in general, because of its higher data rate. (explain)

GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 12160 (24%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB is a little bit (more or less 3%) more effective at texture filtering than the Radeon HD 4770. (explain)

GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Radeon HD 4770 24000 Mtexels/sec
Difference: 624 (3%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4770 is a better choice, but not by far. (explain)

Radeon HD 4770 12000 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 1740 (17%)

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) 640MB

Amazon.com

Check prices at:

Radeon HD 4770

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) 640MB Radeon HD 4770
Manufacturer nVidia AMD
Year Nov 2006 (640) Apr 28, 2009
Code Name G80 RV740
Memory 640 MB 512 MB
Core Speed 513 MHz 750 MHz
Memory Speed 1584 MHz 3200 MHz
Power (Max TDP) 143 watts 80 watts
Bandwidth 63360 MB/sec 51200 MB/sec
Texel Rate 24624 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 12000 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: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 4770

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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