Radeon HD 6750 vs Radeon HD 7750

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 6750		86 Watts
	Difference: 31 Watts (56%)

Memory Bandwidth

Performance-wise, the Radeon HD 7750 should in theory be a bit better than the Radeon HD 6750 in general. (explain)

Radeon HD 7750		72000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon HD 6750 will be just a bit (approximately 2%) better at texture filtering than the Radeon HD 7750. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 500 (2%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7750 is superior to the Radeon HD 6750, though only just barely. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 1200 (10%)

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 largest amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.