GeForce 9800 GTX+ vs Radeon HD 6770 1GB

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 37 Watts (34%)

Memory Bandwidth

In theory, the GeForce 9800 GTX+ should be a small bit faster than the Radeon HD 6770 1GB overall. (explain)

GeForce 9800 GTX+		70400 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce 9800 GTX+ should be much (about 31%) faster with regards to anisotropic filtering than the Radeon HD 6770 1GB. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 11232 (31%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6770 1GB is the winner, by far. (explain)

Radeon HD 6770 1GB		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 data (counted in megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If 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 amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, 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 that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.