Radeon HD 5830 vs Radeon HD 7790

Intro

Compare all of that to the Radeon HD 7790, which features core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 1024 MB of GDDR5 memory. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon HD 5830		175 Watts
	Difference: 90 Watts (106%)

Memory Bandwidth

Performance-wise, the Radeon HD 5830 should in theory be much better than the Radeon HD 7790 overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 32000 (33%)

Texel Rate

The Radeon HD 7790 should be much (approximately 25%) faster with regards to anisotropic filtering than the Radeon HD 5830. (explain)

Radeon HD 7790		56000 Mtexels/sec
Radeon HD 5830		44800 Mtexels/sec
	Difference: 11200 (25%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7790 is a better choice, by far. (explain)

Radeon HD 7790		16000 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 3200 (25%)

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 information (counted in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling 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 the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.