Geforce GTX 770 vs Radeon HD 4790

Intro

Compare all that to the Radeon HD 4790, which comes with core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Geforce GTX 770, in theory, should perform much faster than the Radeon HD 4790 overall. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 121984 (119%)

Texel Rate

The Geforce GTX 770 is quite a bit (approximately 597%) better at anisotropic filtering than the Radeon HD 4790. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 114688 (597%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 770 is superior to the Radeon HD 4790, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 23872 (249%)

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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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