Radeon HD 3690/3830 vs Radeon RX 580

Intro

Compare those specs to the Radeon RX 580, which features a clock frequency of 1257 MHz and a GDDR5 memory frequency of 2000 MHz. It also makes use of a 256-bit memory bus, and uses a 14 nm design. It features 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830		75 Watts
Radeon RX 580		185 Watts
	Difference: 110 Watts (147%)

Memory Bandwidth

The Radeon RX 580 should in theory be quite a bit faster than the Radeon HD 3690/3830 in general. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 235648 (889%)

Texel Rate

The Radeon RX 580 is quite a bit (approximately 1594%) more effective at texture filtering than the Radeon HD 3690/3830. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 170320 (1594%)

Pixel Rate

The Radeon RX 580 will be quite a bit (about 276%) more effective at FSAA than the Radeon HD 3690/3830, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 29536 (276%)

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 data (in units of MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per 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 - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.