GeForce GTX 570 vs Radeon HD 4650 512MB

Intro

Compare all of that to the Radeon HD 4650 512MB, which features a clock frequency of 600 MHz and a DDR2 memory frequency of 500 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It is comprised of 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 570		219 Watts
	Difference: 164 Watts (298%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 570 should in theory be a lot superior to the Radeon HD 4650 512MB overall. (explain)

GeForce GTX 570		152000 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 136000 (850%)

Texel Rate

The GeForce GTX 570 is quite a bit (more or less 129%) better at texture filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 570		43920 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 24720 (129%)

Pixel Rate

The GeForce GTX 570 is much (approximately 510%) better at full screen anti-aliasing than the Radeon HD 4650 512MB, and capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 570		29280 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 24480 (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.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one 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 number of colour ROPs by the the core speed of the card. 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.