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GeForce 8800 GTS (G80) 320MB vs Radeon HD 6770 1GB

Intro

The GeForce 8800 GTS (G80) 320MB has a clock frequency of 513 MHz and a GDDR3 memory speed of 792 MHz. It also makes use of a 320-bit bus, and makes use of a 90 nm design. It is comprised of 96 SPUs, 48 TAUs, and 20 Raster Operation Units.

Compare those specifications to the Radeon HD 6770 1GB, which comes with GPU core speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is made up of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB 108 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

Theoretically, the Radeon HD 6770 1GB should be just a bit faster than the GeForce 8800 GTS (G80) 320MB overall. (explain)

Radeon HD 6770 1GB 67200 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 3840 (6%)

Texel Rate

The Radeon HD 6770 1GB is much (more or less 46%) faster with regards to AF than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Difference: 11376 (46%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6770 1GB is the winner, by far. (explain)

Radeon HD 6770 1GB 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 1GB

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 1GB
Manufacturer nVidia AMD
Year Feb 2007 January 2011
Code Name G80 Juniper XT
Memory 320 MB 1024 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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon HD 6770 1GB

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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