Radeon HD 6790 vs Radeon RX 580

Intro

Compare those specifications to the Radeon RX 580, which has core clock speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs as well as 144 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 580		13630 points
Radeon HD 6790		2150 points
	Difference: 11480 (534%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon RX 580		185 Watts
	Difference: 35 Watts (23%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 580 should be 95% quicker than the Radeon HD 6790 in general, due to its greater bandwidth. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 127744 (95%)

Texel Rate

The Radeon RX 580 will be much (about 439%) more effective at anisotropic filtering than the Radeon HD 6790. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 147408 (439%)

Pixel Rate

The Radeon RX 580 will be quite a bit (approximately 199%) faster with regards to FSAA than the Radeon HD 6790, and also should be able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 26784 (199%)

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 largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.