Radeon HD 5750 512MB vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which uses a 28 nm design. AMD has set the core speed at 900 MHz. The GDDR5 RAM works at a speed of 1400 MHz on this specific card. It features 1280 SPUs as well as 80 Texture Address Units 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

Theoretically speaking, the Radeon R9 270 will be 143% quicker than the Radeon HD 5750 512MB overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon R9 270 is much (approximately 186%) more effective at texture filtering 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 is quite a bit (more or less 157%) more effective at FSAA than the Radeon HD 5750 512MB, and also capable of handling higher resolutions better. (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 information (measured in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses 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 figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the 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 maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.