GeForce GTX 560 vs Radeon HD 4830 512MB

Intro

Compare those specs to the Radeon HD 4830 512MB, which features a clock frequency of 575 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 256-bit 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

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
GeForce GTX 560		150 Watts
	Difference: 55 Watts (58%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 560 should theoretically be a lot better than the Radeon HD 4830 512MB in general. (explain)

GeForce GTX 560		128128 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 70528 (122%)

Texel Rate

The GeForce GTX 560 is much (about 147%) faster with regards to anisotropic filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTX 560		45360 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 26960 (147%)

Pixel Rate

The GeForce GTX 560 should be a lot (more or less 182%) better at FSAA than the Radeon HD 4830 512MB, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 560		25920 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 16720 (182%)

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 max amount of data (counted in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.