GeForce GTX 750 Ti vs Radeon HD 4790

Intro

Compare all of that to the Radeon HD 4790, which features a GPU core clock speed of 600 MHz, and 512 MB of GDDR5 RAM running at 800 MHz through a 256-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

Memory Bandwidth

The Radeon HD 4790 should in theory be a small 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 should be a lot (more or less 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 a high resolution is important to you, then the GeForce GTX 750 Ti is superior to the Radeon HD 4790, and very much so. (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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 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 anti-aliasing, 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 worked out by multiplying the total 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.