GeForce GTX 470 vs Radeon HD 4770

Intro

Compare that 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 RAM. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the GeForce GTX 470 will be 162% quicker than the Radeon HD 4770 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX 470 will be much (about 42%) more effective at AF 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 is much (more or less 102%) more effective at AA than the Radeon HD 4770, and also able to handle higher screen resolutions better. (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 largest amount of data (measured in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount 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 in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.