GeForce GTX 950 vs Radeon HD 4790

Intro

Compare all of that to the Radeon HD 4790, which makes use of a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR5 memory works at a speed of 800 MHz on this model. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 950 should be 3% faster than the Radeon HD 4790 in general, because of its greater data rate. (explain)

GeForce GTX 950		105728 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 3328 (3%)

Texel Rate

The GeForce GTX 950 is a lot (about 156%) better at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 950		49152 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 29952 (156%)

Pixel Rate

The GeForce GTX 950 should be quite a bit (approximately 241%) faster with regards to AA than the Radeon HD 4790, and also capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 950		32768 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 23168 (241%)

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 max amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.