GeForce 8800 GTS (G80) 320MB vs Radeon HD 6670 (OEM)

Intro

Compare those specifications to the Radeon HD 6670 (OEM), which comes with a clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 128-bit bus, and uses a 40 nm design. It features 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 80 Watts (127%)

Memory Bandwidth

In theory, the Radeon HD 6670 (OEM) should be a small bit faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB is a lot (approximately 28%) more effective at anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 5424 (28%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB is quite a bit (approximately 60%) more effective at anti-aliasing than the Radeon HD 6670 (OEM), and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce 8800 GTS (G80) 320MB		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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.