GeForce GTX 650 Ti vs Radeon HD 4790

Intro

Compare those specs to the Radeon HD 4790, which features clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4790 will be 19% faster than the GeForce GTX 650 Ti overall, because of its higher data rate. (explain)

Radeon HD 4790		102400 MB/sec
GeForce GTX 650 Ti		86400 MB/sec
	Difference: 16000 (19%)

Texel Rate

The GeForce GTX 650 Ti is a lot (about 209%) faster with regards to texture filtering than the Radeon HD 4790. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 40192 (209%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 650 Ti is superior to the Radeon HD 4790, and very much so. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 5248 (55%)

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 largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 can be applied per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video 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 can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.