GeForce GTX 260 vs Radeon HD 6670 (OEM)

Intro

Compare that to the Radeon HD 6670 (OEM), which has a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is comprised of 480 SPUs, 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 260		182 Watts
	Difference: 119 Watts (189%)

Memory Bandwidth

Performance-wise, the GeForce GTX 260 should theoretically be much better than the Radeon HD 6670 (OEM) overall. (explain)

GeForce GTX 260		111888 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 47888 (75%)

Texel Rate

The GeForce GTX 260 will be a lot (approximately 92%) more effective at AF than the Radeon HD 6670 (OEM). (explain)

GeForce GTX 260		36864 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 17664 (92%)

Pixel Rate

The GeForce GTX 260 will be a lot (more or less 152%) more effective at full screen anti-aliasing than the Radeon HD 6670 (OEM), and also able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 260		16128 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 9728 (152%)

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 information (counted in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.