Radeon HD 5750 512MB vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which features a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is made up of 512 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5750 512MB		86 Watts
	Difference: 31 Watts (56%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5750 512MB will be 2% quicker than the Radeon HD 7750 overall, due to its higher bandwidth. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon HD 7750 will be just a bit (more or less 2%) more effective at AF than the Radeon HD 5750 512MB. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 400 (2%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7750 is superior to the Radeon HD 5750 512MB, but not by far. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 5750 512MB		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: Bandwidth is the max amount of information (in units of megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated 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 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 the video card can 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 colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.