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GeForce 8800 GTS (G80) 320MB vs Radeon HD 6770

Intro

The GeForce 8800 GTS (G80) 320MB comes with a clock speed of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also uses a 320-bit bus, and makes use of a 90 nm design. It features 96 SPUs, 48 TAUs, and 20 ROPs.

Compare that to the Radeon HD 6770, which features a GPU core clock speed of 900 MHz, and 512 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 108 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 will be 6% faster than the GeForce 8800 GTS (G80) 320MB overall, because of its higher data rate. (explain)

Radeon HD 6770 67200 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 3840 (6%)

Texel Rate

The Radeon HD 6770 will be a lot (about 46%) faster with regards to AF than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 6770 36000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Difference: 11376 (46%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6770 is the winner, by a large margin. (explain)

Radeon HD 6770 14400 Mpixels/sec
GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Difference: 4140 (40%)

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 6770

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 6770
Manufacturer nVidia AMD
Year Feb 2007 January 2011
Code Name G80 Juniper XT
Memory 320 MB 512 MB
Core Speed 513 MHz 900 MHz
Memory Speed 1584 MHz 4200 MHz
Power (Max TDP) 143 watts 108 watts
Bandwidth 63360 MB/sec 67200 MB/sec
Texel Rate 24624 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 96 800
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 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better 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 most pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon HD 6770

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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