Radeon HD 3850 X2 vs Radeon HD 6670 (OEM)

Intro

Compare that to the Radeon HD 6670 (OEM), which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this card. It features 480 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 3850 X2 should theoretically be a lot better than the Radeon HD 6670 (OEM) overall. (explain)

Radeon HD 3850 X2		105984 MB/sec
Radeon HD 6670 (OEM)		64000 MB/sec
	Difference: 41984 (66%)

Texel Rate

The Radeon HD 3850 X2 is a little bit (approximately 11%) more effective at texture filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 3850 X2		21376 Mtexels/sec
Radeon HD 6670 (OEM)		19200 Mtexels/sec
	Difference: 2176 (11%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 3850 X2 is superior to the Radeon HD 6670 (OEM), by a large margin. (explain)

Radeon HD 3850 X2		21376 Mpixels/sec
Radeon HD 6670 (OEM)		6400 Mpixels/sec
	Difference: 14976 (234%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transported past 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 RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, 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 card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.