Radeon HD 5670 vs Radeon HD 7850

Intro

Compare those specs to the Radeon HD 7850, which uses a 28 nm design. AMD has set the core speed at 860 MHz. The GDDR5 RAM runs at a speed of 1200 MHz on this particular model. It features 1024 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 7850		130 Watts
	Difference: 69 Watts (113%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7850 should theoretically be a lot superior to the Radeon HD 5670 overall. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 89600 (140%)

Texel Rate

The Radeon HD 7850 is quite a bit (more or less 255%) faster with regards to texture filtering than the Radeon HD 5670. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 39540 (255%)

Pixel Rate

The Radeon HD 7850 will be quite a bit (about 344%) better at FSAA than the Radeon HD 5670, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 21320 (344%)

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 transported across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it must 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core 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 quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.