Radeon HD 5750 1GB vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which features GPU 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 comprised 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

Performance-wise, the Radeon HD 5750 1GB should theoretically be a bit better than the Radeon HD 7750 overall. (explain)

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

Texel Rate

The Radeon HD 7750 is just a bit (more or less 2%) more effective at AF 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

The Radeon HD 7750 should be a bit (about 14%) faster with regards to AA than the Radeon HD 5750 1GB, and will be capable of handling higher screen resolutions better. (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: Bandwidth is the max amount of data (counted in MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.