Radeon HD 5750 512MB vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which makes use of a 28 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory is set to run at a frequency of 1400 MHz on this particular model. It features 1280 SPUs along with 80 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 270		150 Watts
	Difference: 64 Watts (74%)

Memory Bandwidth

Performance-wise, the Radeon R9 270 should in theory be a lot better than the Radeon HD 5750 512MB in general. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 105600 (143%)

Texel Rate

The Radeon R9 270 is a lot (about 186%) more effective at AF than the Radeon HD 5750 512MB. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 46800 (186%)

Pixel Rate

The Radeon R9 270 will be a lot (about 157%) faster with regards to anti-aliasing than the Radeon HD 5750 512MB, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 17600 (157%)

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 (in units of megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.