GeForce GTX 260 vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which has GPU clock speed of 900 MHz, and 512 MB of GDDR5 RAM running at 1050 MHz through a 128-bit bus. It also is comprised of 800 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce GTX 260		182 Watts
	Difference: 74 Watts (69%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 260 should theoretically be much superior to the Radeon HD 6770 in general. (explain)

GeForce GTX 260		111888 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 44688 (67%)

Texel Rate

The GeForce GTX 260 is just a bit (about 2%) more effective at AF than the Radeon HD 6770. (explain)

GeForce GTX 260		36864 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 864 (2%)

Pixel Rate

The GeForce GTX 260 is a little bit (more or less 12%) more effective at anti-aliasing than the Radeon HD 6770, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 260		16128 Mpixels/sec
Radeon HD 6770		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: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the 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 core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.