GeForce 8800 GTS (G80) 640MB vs Radeon HD 6670 (OEM)

Intro

Compare all that to the Radeon HD 6670 (OEM), which comes with core speeds of 800 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 80 Watts (127%)

Memory Bandwidth

In theory, the Radeon HD 6670 (OEM) will be 1% faster than the GeForce 8800 GTS (G80) 640MB overall, due to its higher data rate. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB will be a lot (more or less 28%) faster with regards to AF than the Radeon HD 6670 (OEM). (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 5424 (28%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 8800 GTS (G80) 640MB is the winner, by a large margin. (explain)

GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 3860 (60%)

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 information (counted in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.