GeForce GTX 560 vs Radeon HD 4830 512MB

Intro

Compare those specs to the Radeon HD 4830 512MB, which comes with a clock speed of 575 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 256-bit memory bus, and uses a 55 nm design. It is comprised of 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

Theoretically speaking, the GeForce GTX 560 should be much faster than the Radeon HD 4830 512MB overall. (explain)

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

Texel Rate

The GeForce GTX 560 should be a lot (about 147%) better at 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 will be quite a bit (approximately 182%) better at anti-aliasing than the Radeon HD 4830 512MB, and also able to handle higher resolutions better. (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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's bus 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 higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate 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 filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.