GeForce GTX 260 vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which has a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

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

The GeForce GTX 260 should theoretically perform quite a bit faster than the Radeon HD 6770 overall. (explain)

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

Texel Rate

The GeForce GTX 260 will be a small bit (more or less 2%) faster with regards to texture filtering 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 just a bit (about 12%) more effective at FSAA than the Radeon HD 6770, and also able to handle higher resolutions while still performing well. (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 MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.