Geforce GTX 760 vs Radeon HD 4770

Intro

Compare those specs to the Radeon HD 4770, which features GPU clock speed of 750 MHz, and 512 MB of GDDR5 memory running at 800 MHz through a 128-bit bus. It also features 640(128x5) Stream Processors, 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 760		170 Watts
	Difference: 90 Watts (113%)

Memory Bandwidth

The Geforce GTX 760, in theory, should perform much faster than the Radeon HD 4770 overall. (explain)

Geforce GTX 760		192256 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 141056 (276%)

Texel Rate

The Geforce GTX 760 will be quite a bit (more or less 292%) faster with regards to texture filtering than the Radeon HD 4770. (explain)

Geforce GTX 760		94080 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 70080 (292%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 760 is the winner, by far. (explain)

Geforce GTX 760		31360 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 19360 (161%)

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 (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, 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 most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. 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 - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.