Radeon HD 5830 vs Radeon R9 Nano

Intro

Compare those specifications to the Radeon R9 Nano, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The HBM memory runs at a frequency of 500 MHz on this specific card. It features 4096 SPUs as well as 256 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the Radeon R9 Nano will be 300% quicker than the Radeon HD 5830 in general, due to its higher data rate. (explain)

Radeon R9 Nano		512000 MB/sec
Radeon HD 5830		128000 MB/sec
	Difference: 384000 (300%)

Texel Rate

The Radeon R9 Nano will be much (approximately 471%) faster with regards to texture filtering than the Radeon HD 5830. (explain)

Radeon R9 Nano		256000 Mtexels/sec
Radeon HD 5830		44800 Mtexels/sec
	Difference: 211200 (471%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 Nano is a better choice, by a large margin. (explain)

Radeon R9 Nano		64000 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 51200 (400%)

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 information (counted in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.