GeForce GTX 960 vs Radeon HD 4790

Intro

Compare those specs to the Radeon HD 4790, which comes with 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 is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 960 should be a bit faster than the Radeon HD 4790 overall. (explain)

GeForce GTX 960		112000 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 9600 (9%)

Texel Rate

The GeForce GTX 960 will be quite a bit (more or less 276%) faster with regards to AF than the Radeon HD 4790. (explain)

GeForce GTX 960		72128 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 52928 (276%)

Pixel Rate

The GeForce GTX 960 should be much (about 276%) faster with regards to AA than the Radeon HD 4790, and also able to handle higher resolutions better. (explain)

GeForce GTX 960		36064 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 26464 (276%)

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 transferred past the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses 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 texture map elements (texels) that are applied in one second. This number is calculated 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.