Radeon HD 5830 vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which uses a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM runs at a frequency of 1125 MHz on this particular model. It features 512 SPUs along with 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 5830		175 Watts
	Difference: 120 Watts (218%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5830 should in theory be much better than the Radeon HD 7750 overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon HD 5830 should be quite a bit (about 75%) faster with regards to texture filtering than the Radeon HD 7750. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 19200 (75%)

Pixel Rate

Both cards have exactly the same pixel fill rate, so theoretically they should be equally good at at full screen anti-aliasing, and be capable of handling the same screen resolutions. (explain)

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 maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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