GeForce GTX 260 216SP 55 nm vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which has core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 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 1GB		108 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 63 Watts (58%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 260 216SP 55 nm should in theory be a lot better than the Radeon HD 6770 1GB overall. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 44688 (67%)

Texel Rate

The GeForce GTX 260 216SP 55 nm will be a small bit (about 15%) better at texture filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 5472 (15%)

Pixel Rate

The GeForce GTX 260 216SP 55 nm should be a small bit (approximately 12%) faster with regards to AA than the Radeon HD 6770 1GB, and will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 1728 (12%)

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 largest amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number 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 colour ROPs by the the card's 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.