GeForce GTX 950M vs Radeon HD 4790

Intro

Compare all of that to the Radeon HD 4790, which features a clock frequency of 600 MHz and a GDDR5 memory frequency of 800 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 4790 should in theory be a lot better than the GeForce GTX 950M in general. (explain)

Radeon HD 4790		102400 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 70400 (220%)

Texel Rate

The GeForce GTX 950M is quite a bit (more or less 90%) better at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 950M		36560 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 17360 (90%)

Pixel Rate

The GeForce GTX 950M should be a lot (approximately 52%) better at AA than the Radeon HD 4790, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 950M		14624 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 5024 (52%)

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 data (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.