GeForce GTX 285 1GB vs Radeon HD 6670 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which has a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is made up of 480 Stream Processors, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 141 Watts (224%)

Memory Bandwidth

Theoretically, the GeForce GTX 285 1GB should be much faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

GeForce GTX 285 1GB		158976 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 94976 (148%)

Texel Rate

The GeForce GTX 285 1GB will be quite a bit (approximately 170%) more effective at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 32640 (170%)

Pixel Rate

The GeForce GTX 285 1GB should be quite a bit (about 224%) better at full screen anti-aliasing than the Radeon HD 6670 (OEM) 1GB, and also will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 14336 (224%)

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 max amount of data (measured in megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once 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, HDR 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.