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GeForce 8800 GTS (G80) 640MB vs Radeon HD 5770

Intro

The GeForce 8800 GTS (G80) 640MB makes use of a 90 nm design. nVidia has clocked the core frequency at 513 MHz. The GDDR3 RAM is set to run at a speed of 792 MHz on this particular model. It features 96 SPUs along with 48 Texture Address Units and 20 ROPs.

Compare all that to the Radeon HD 5770, which features core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

In theory, the Radeon HD 5770 should be much faster than the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon HD 5770 76800 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 13440 (21%)

Texel Rate

The Radeon HD 5770 will be much (more or less 38%) better at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon HD 5770 34000 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 9376 (38%)

Pixel Rate

The Radeon HD 5770 will be a lot (approximately 33%) better at anti-aliasing than the GeForce 8800 GTS (G80) 640MB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 5770 13600 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 3340 (33%)

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 5770

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

Display Specifications

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Model GeForce 8800 GTS (G80) 640MB Radeon HD 5770
Manufacturer nVidia AMD
Year Nov 2006 (640) October 13, 2009
Code Name G80 Juniper XT
Memory 640 MB 1024 MB
Core Speed 513 MHz 850 MHz
Memory Speed 1584 MHz 4800 MHz
Power (Max TDP) 143 watts 108 watts
Bandwidth 63360 MB/sec 76800 MB/sec
Texel Rate 24624 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 96 800(160x5)
Texture Mapping Units 48 40
Render Output Units 20 16
Bus Type GDDR3 GDDR5
Bus Width 320-bit 128-bit
Fab Process 90 nm 40 nm
Transistors 681 million 1040 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of 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 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 5770

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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