GeForce GTX 560 Ti 448 vs Radeon HD 4790

Intro

Compare all of that to the Radeon HD 4790, which has a core clock frequency of 600 MHz and a GDDR5 memory frequency of 800 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 560 Ti 448 should be much faster than the Radeon HD 4790 overall. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 41600 (41%)

Texel Rate

The GeForce GTX 560 Ti 448 is much (approximately 114%) more effective at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 560 Ti 448		40992 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 21792 (114%)

Pixel Rate

The GeForce GTX 560 Ti 448 will be a lot (more or less 205%) faster with regards to anti-aliasing than the Radeon HD 4790, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 19680 (205%)

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 (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its 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 the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.