Radeon HD 3870 1GB vs Radeon HD 6670 (OEM)

Intro

Compare all that to the Radeon HD 6670 (OEM), which comes with GPU clock speed of 800 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is made up of 480 Stream Processors, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM)		63 Watts
Radeon HD 3870 1GB		106 Watts
	Difference: 43 Watts (68%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 3870 1GB is 13% faster than the Radeon HD 6670 (OEM) overall, due to its greater data rate. (explain)

Radeon HD 3870 1GB		72000 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon HD 6670 (OEM) should be a lot (more or less 55%) better at AF than the Radeon HD 3870 1GB. (explain)

Radeon HD 6670 (OEM)		19200 Mtexels/sec
Radeon HD 3870 1GB		12400 Mtexels/sec
	Difference: 6800 (55%)

Pixel Rate

The Radeon HD 3870 1GB should be quite a bit (approximately 94%) faster with regards to AA than the Radeon HD 6670 (OEM), and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 3870 1GB		12400 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 6000 (94%)

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 largest amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its 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 clock speed of the card. 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 ability to reach the max fill rate.