GeForce 8800 GTS (G80) 320MB vs Radeon HD 6570 (OEM) 2GB

Intro

Compare that to the Radeon HD 6570 (OEM) 2GB, which comes with a clock frequency of 650 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB		50 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 93 Watts (186%)

Memory Bandwidth

The Radeon HD 6570 (OEM) 2GB, in theory, should perform just a bit faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB is much (about 58%) faster with regards to anisotropic filtering than the Radeon HD 6570 (OEM) 2GB. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
	Difference: 9024 (58%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB will be quite a bit (more or less 97%) more effective at anti-aliasing than the Radeon HD 6570 (OEM) 2GB, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
	Difference: 5060 (97%)

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 (in units of MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.