Radeon HD 5670 vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which has clock speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 TAUs 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 R9 285		190 Watts
	Difference: 129 Watts (211%)

Memory Bandwidth

The Radeon R9 285 should theoretically perform quite a bit faster than the Radeon HD 5670 overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 112000 (175%)

Texel Rate

The Radeon R9 285 is much (more or less 563%) faster with regards to AF than the Radeon HD 5670. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 87316 (563%)

Pixel Rate

The Radeon R9 285 will be quite a bit (about 374%) more effective at FSAA than the Radeon HD 5670, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 23176 (374%)

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 (in units of MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.