GeForce GTX 870M vs Radeon HD 6670 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which uses a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this particular card. It features 480 SPUs along with 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 870M		110 Watts
	Difference: 47 Watts (75%)

Memory Bandwidth

The GeForce GTX 870M should theoretically be much faster than the Radeon HD 6670 (OEM) 1GB in general. (explain)

GeForce GTX 870M		96000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 32000 (50%)

Texel Rate

The GeForce GTX 870M is a lot (approximately 449%) better at AF than the Radeon HD 6670 (OEM) 1GB. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 86192 (449%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 870M is the winner, and very much so. (explain)

GeForce GTX 870M		22584 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 16184 (253%)

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 data (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.