GeForce GTX 470 vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which comes with a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It features 800(160x5) SPUs, 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 5770		108 Watts
GeForce GTX 470		215 Watts
	Difference: 107 Watts (99%)

Memory Bandwidth

In theory, the GeForce GTX 470 should be 74% quicker than the Radeon HD 5770 in general, due to its greater data rate. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 57120 (74%)

Texel Rate

The Radeon HD 5770 is a little bit (approximately 0%) more effective at texture filtering than the GeForce GTX 470. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 8 (0%)

Pixel Rate

The GeForce GTX 470 is a lot (approximately 79%) more effective at anti-aliasing than the Radeon HD 5770, and able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 10680 (79%)

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 (measured in MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.