GeForce 9800 GTX+ vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 RAM runs at a frequency of 1050 MHz on this particular model. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 37 Watts (34%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GTX+ should in theory be a bit better than the Radeon HD 6770 in general. (explain)

GeForce 9800 GTX+		70400 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce 9800 GTX+ is much (more or less 31%) more effective at AF than the Radeon HD 6770. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 11232 (31%)

Pixel Rate

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

Radeon HD 6770		14400 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 2592 (22%)

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 megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high 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 of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.