Radeon HD 5830 vs Radeon R9 270X

Intro

Compare those specs to the Radeon R9 270X, which features a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 memory set to run at 1400 MHz through a 256-bit bus. It also is comprised of 1280 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5830		175 Watts
Radeon R9 270X		180 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

In theory, the Radeon R9 270X will be 40% faster than the Radeon HD 5830 overall, because of its higher bandwidth. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 5830		128000 MB/sec
	Difference: 51200 (40%)

Texel Rate

The Radeon R9 270X is much (approximately 79%) faster with regards to texture filtering than the Radeon HD 5830. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 5830		44800 Mtexels/sec
	Difference: 35200 (79%)

Pixel Rate

The Radeon R9 270X should be quite a bit (approximately 150%) faster with regards to AA than the Radeon HD 5830, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 19200 (150%)

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 (counted in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 are applied per second. This 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.