GeForce GTX 260 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which uses a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 RAM works at a frequency of 1200 MHz on this card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 260		182 Watts
	Difference: 74 Watts (69%)

Memory Bandwidth

The GeForce GTX 260 should theoretically be much faster than the Radeon HD 5770 in general. (explain)

GeForce GTX 260		111888 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 35088 (46%)

Texel Rate

The GeForce GTX 260 will be a bit (approximately 8%) faster with regards to texture filtering than the Radeon HD 5770. (explain)

GeForce GTX 260		36864 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 2864 (8%)

Pixel Rate

The GeForce GTX 260 is a small bit (more or less 19%) faster with regards to AA than the Radeon HD 5770, and also should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 260		16128 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 2528 (19%)

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 MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be processed per second. This 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.