Radeon HD 5750 512MB vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which comes with core clock speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
Radeon R9 285		190 Watts
	Difference: 104 Watts (121%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 should perform much faster than the Radeon HD 5750 512MB overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 102400 (139%)

Texel Rate

The Radeon R9 285 should be a lot (more or less 308%) better at AF than the Radeon HD 5750 512MB. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 77616 (308%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 285 is the winner, by far. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon HD 5750 512MB		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 information (in units of MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can 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 colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.