Radeon HD 5750 512MB vs Radeon HD 6790

Intro

Compare those specifications to the Radeon HD 6790, which comes with a core clock frequency of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
Radeon HD 6790		150 Watts
	Difference: 64 Watts (74%)

Memory Bandwidth

Performance-wise, the Radeon HD 6790 should in theory be quite a bit superior to the Radeon HD 5750 512MB in general. (explain)

Radeon HD 6790		134400 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 60800 (83%)

Texel Rate

The Radeon HD 6790 should be much (more or less 33%) faster with regards to texture filtering than the Radeon HD 5750 512MB. (explain)

Radeon HD 6790		33600 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 8400 (33%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6790 is superior to the Radeon HD 5750 512MB, but only just. (explain)

Radeon HD 6790		13440 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 2240 (20%)

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 maximum amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This 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 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 number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.