GeForce GTX 470 vs Radeon HD 5770

Intro

Compare all that to the Radeon HD 5770, which comes with GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

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

The GeForce GTX 470 should in theory be quite a bit faster than the Radeon HD 5770 overall. (explain)

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

Texel Rate

The Radeon HD 5770 should be a little bit (about 0%) better at anisotropic filtering than the GeForce GTX 470. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 470 is a better choice, by far. (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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.