GeForce GTX 560 Ti vs Radeon HD 4770

Intro

Compare those specifications to the Radeon HD 4770, which makes use of a 40 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 memory runs at a frequency of 800 MHz on this particular card. It features 640(128x5) SPUs as well as 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 560 Ti		170 Watts
	Difference: 90 Watts (113%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 Ti should be 151% quicker than the Radeon HD 4770 in general, due to its greater bandwidth. (explain)

GeForce GTX 560 Ti		128256 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 77056 (151%)

Texel Rate

The GeForce GTX 560 Ti is much (more or less 119%) more effective at texture filtering than the Radeon HD 4770. (explain)

GeForce GTX 560 Ti		52608 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 28608 (119%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 560 Ti is superior to the Radeon HD 4770, and very much so. (explain)

GeForce GTX 560 Ti		26304 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 14304 (119%)

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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the 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 maximum amount of 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 Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.