Radeon HD 5670 vs Radeon HD 7850

Intro

Compare all that to the Radeon HD 7850, which has a core clock frequency of 860 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 32 ROPs.

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

Theoretically speaking, the Radeon HD 7850 will be 140% faster than the Radeon HD 5670 in general, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon HD 7850 will be a lot (approximately 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 should be much (approximately 344%) faster with regards to anti-aliasing than the Radeon HD 5670, and should be able to handle higher screen resolutions while still performing well. (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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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