GeForce GTX 275 vs Radeon HD 6670 (OEM)

Intro

Compare all of that to the Radeon HD 6670 (OEM), which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this particular card. It features 480 SPUs as well as 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)		63 Watts
GeForce GTX 275		219 Watts
	Difference: 156 Watts (248%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 should perform a lot faster than the Radeon HD 6670 (OEM) in general. (explain)

GeForce GTX 275		127008 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 63008 (98%)

Texel Rate

The GeForce GTX 275 should be a lot (approximately 164%) faster with regards to texture filtering than the Radeon HD 6670 (OEM). (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 31440 (164%)

Pixel Rate

The GeForce GTX 275 is much (more or less 177%) faster with regards to anti-aliasing than the Radeon HD 6670 (OEM), and should be able to handle higher resolutions better. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 11324 (177%)

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 maximum amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better 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 a 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 number is worked out by multiplying the amount 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.