Geforce GTX 690 vs Radeon HD 4790

Intro

Compare all of that to the Radeon HD 4790, which uses a 55 nm design. AMD has clocked the core frequency at 600 MHz. The GDDR5 memory runs at a frequency of 800 MHz on this specific card. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Geforce GTX 690, in theory, should perform a lot faster than the Radeon HD 4790 in general. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 282112 (276%)

Texel Rate

The Geforce GTX 690 is a lot (more or less 1120%) more effective at AF than the Radeon HD 4790. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 215040 (1120%)

Pixel Rate

The Geforce GTX 690 is a lot (about 510%) more effective at FSAA than the Radeon HD 4790, and also should be able to handle higher screen resolutions better. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 48960 (510%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.