Radeon HD 5750 1GB vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which features GPU clock speed of 918 MHz, and 2048 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
Radeon R9 285		190 Watts
	Difference: 104 Watts (121%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 is 139% faster than the Radeon HD 5750 1GB in general, because of its greater bandwidth. (explain)

Radeon R9 285		176000 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 102400 (139%)

Texel Rate

The Radeon R9 285 should be quite a bit (about 308%) more effective at anisotropic filtering than the Radeon HD 5750 1GB. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 77616 (308%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 285 is the winner, by a large margin. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 18176 (162%)

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 max amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This 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 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 that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.