Radeon HD 5750 1GB vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which comes with a core clock frequency of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5750 1GB		86 Watts
	Difference: 31 Watts (56%)

Memory Bandwidth

The Radeon HD 5750 1GB should in theory perform a bit faster than the Radeon HD 7750 in general. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon HD 7750 is a little bit (more or less 2%) more effective at anisotropic filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 400 (2%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7750 is a better choice, but it probably won't make a huge difference. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 1600 (14%)

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 (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.