GeForce GTX 750 Ti vs Radeon HD 4790

Intro

Compare all that to the Radeon HD 4790, which comes with a GPU core clock speed of 600 MHz, and 512 MB of GDDR5 memory set to run at 800 MHz through a 256-bit bus. It also is comprised of 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 4790 should be a little bit faster than the GeForce GTX 750 Ti overall. (explain)

Radeon HD 4790		102400 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 16000 (19%)

Texel Rate

The GeForce GTX 750 Ti will be much (about 113%) better at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 21600 (113%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 750 Ti is superior to the Radeon HD 4790, by far. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 6720 (70%)

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 (measured in MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.