Radeon HD 5850 vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which comes with core clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5850		151 Watts
	Difference: 96 Watts (175%)

Memory Bandwidth

The Radeon HD 5850, in theory, should be a lot faster than the Radeon HD 7750 in general. (explain)

Radeon HD 5850		128000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon HD 5850 is a lot (about 104%) faster with regards to AF than the Radeon HD 7750. (explain)

Radeon HD 5850		52200 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 26600 (104%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 5850 is a better choice, by a large margin. (explain)

Radeon HD 5850		23200 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 10400 (81%)

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 MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. 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 card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.