GeForce GTX 260 216SP 55 nm vs Radeon HD 4790

Intro

Compare those specs to the Radeon HD 4790, which makes use of a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR5 RAM is set to run at a speed of 800 MHz on this card. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 260 216SP 55 nm, in theory, should perform a bit faster than the Radeon HD 4790 overall. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 9488 (9%)

Texel Rate

The GeForce GTX 260 216SP 55 nm is quite a bit (about 116%) faster with regards to AF than the Radeon HD 4790. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 22272 (116%)

Pixel Rate

The GeForce GTX 260 216SP 55 nm will be quite a bit (approximately 68%) better at AA than the Radeon HD 4790, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 6528 (68%)

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 (measured in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling 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 graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.