GeForce GTX 470 vs Radeon HD 4770

Intro

Compare those specifications to the Radeon HD 4770, which comes with core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
GeForce GTX 470		215 Watts
	Difference: 135 Watts (169%)

Memory Bandwidth

The GeForce GTX 470 should in theory perform quite a bit faster than the Radeon HD 4770 in general. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 82720 (162%)

Texel Rate

The GeForce GTX 470 will be a lot (approximately 42%) faster with regards to anisotropic filtering than the Radeon HD 4770. (explain)

GeForce GTX 470		33992 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 9992 (42%)

Pixel Rate

The GeForce GTX 470 will be much (approximately 102%) better at AA than the Radeon HD 4770, and will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 12280 (102%)

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 maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 number 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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