GeForce GTX 960M 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 uses a 256-bit memory bus, and makes use of a 55 nm design. It features 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4790, in theory, should perform quite a bit faster than the GeForce GTX 960M in general. (explain)

Radeon HD 4790		102400 MB/sec
GeForce GTX 960M		64000 MB/sec
	Difference: 38400 (60%)

Texel Rate

The GeForce GTX 960M should be a lot (approximately 128%) faster with regards to anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 960M		43840 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 24640 (128%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 960M is a better choice, by far. (explain)

GeForce GTX 960M		17536 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 7936 (83%)

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 (counted in MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum 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 this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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