Geforce GTX 770 vs Radeon HD 4770

Intro

Compare all of that to the Radeon HD 4770, which has 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 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
Geforce GTX 770		230 Watts
	Difference: 150 Watts (188%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 should be a lot faster than the Radeon HD 4770 in general. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 173184 (338%)

Texel Rate

The Geforce GTX 770 will be quite a bit (more or less 458%) more effective at anisotropic filtering than the Radeon HD 4770. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 109888 (458%)

Pixel Rate

The Geforce GTX 770 will be quite a bit (more or less 179%) more effective at AA than the Radeon HD 4770, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 21472 (179%)

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 information (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses 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, HDR and high 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 number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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