Radeon HD 5670 vs Radeon HD 5870

Intro

Compare those specs to the Radeon HD 5870, which comes with clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 1600(320x5) SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 5870		188 Watts
	Difference: 127 Watts (208%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 should perform a lot faster than the Radeon HD 5670 overall. (explain)

Radeon HD 5870		153600 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 89600 (140%)

Texel Rate

The Radeon HD 5870 should be quite a bit (about 339%) better at texture filtering than the Radeon HD 5670. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 52500 (339%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5870 is superior to the Radeon HD 5670, and very much so. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 21000 (339%)

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 max amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 Render Output Units 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 is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.