GeForce 8800 GTS (G92) vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which uses a 40 nm design. ATi has clocked the core frequency at 900 MHz. The GDDR5 RAM is set to run at a frequency of 1050 MHz on this model. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce 8800 GTS (G92)		135 Watts
	Difference: 27 Watts (25%)

Memory Bandwidth

In theory, the Radeon HD 6770 1GB should be a little bit faster than the GeForce 8800 GTS (G92) overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce 8800 GTS (G92)		62080 MB/sec
	Difference: 5120 (8%)

Texel Rate

The GeForce 8800 GTS (G92) is a bit (approximately 16%) more effective at AF than the Radeon HD 6770 1GB. (explain)

GeForce 8800 GTS (G92)		41600 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 5600 (16%)

Pixel Rate

The Radeon HD 6770 1GB should be a lot (about 38%) faster with regards to AA than the GeForce 8800 GTS (G92), and will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 4000 (38%)

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

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.