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

Intro

The GeForce 8800 GTS (G80) 320MB features clock speeds of 513 MHz on the GPU, and 792 MHz on the 320 MB of GDDR3 memory. It features 96 SPUs as well as 48 Texture Address Units and 20 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6770, which comes with 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 is comprised of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce 8800 GTS (G80) 320MB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 6770 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce 8800 GTS (G80) 320MB	Radeon HD 6770
Manufacturer	nVidia	ATi
Year	Feb 2007	January 2011
Code Name	G80	Juniper XT
Fab Process	90 nm	40 nm
Bus	PCIe x16	PCIe x16
Memory	320 MB	512 MB
Core Speed	513 MHz	900 MHz
Shader Speed	1188 MHz	(N/A) MHz
Memory Speed	792 MHz	1050 MHz
Unified Shaders	96	800
Texture Mapping Units	48	40
Render Output Units	20	16
Bus Type	GDDR3	GDDR5
Bus Width	320-bit	128-bit
DirectX Version	DirectX 10	DirectX 11
OpenGL Version	OpenGL 3.0	OpenGL 4.1
Power (Max TDP)	143 watts	108 watts
Shader Model	4.0	5.0
Bandwidth	63360 MB/sec	67200 MB/sec
Texel Rate	24624 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	10260 Mpixels/sec	14400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.