Radeon HD 5750 512MB vs Radeon R9 280

Intro

Compare all that to the Radeon R9 280, which makes use of a 28 nm design. AMD has clocked the core speed at 933 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this particular model. 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 280		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

Performance-wise, the Radeon R9 280 should in theory be quite a bit better than the Radeon HD 5750 512MB in general. (explain)

Radeon R9 280		240000 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 166400 (226%)

Texel Rate

The Radeon R9 280 is much (more or less 315%) more effective at texture filtering than the Radeon HD 5750 512MB. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 79296 (315%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 280 is superior to the Radeon HD 5750 512MB, and very much so. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 18656 (167%)

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 (measured in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.