Radeon HD 6790 vs Radeon RX 460 2GB

Intro

Compare that to the Radeon RX 460 2GB, which comes with core clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 RAM. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon HD 6790		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6790 should theoretically be a small bit better than the Radeon RX 460 2GB in general. (explain)

Radeon HD 6790		134400 MB/sec
Radeon RX 460 2GB		112000 MB/sec
	Difference: 22400 (20%)

Texel Rate

The Radeon RX 460 2GB should be quite a bit (about 82%) more effective at texture filtering than the Radeon HD 6790. (explain)

Radeon RX 460 2GB		61040 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 27440 (82%)

Pixel Rate

The Radeon RX 460 2GB should be quite a bit (approximately 30%) faster with regards to anti-aliasing than the Radeon HD 6790, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 460 2GB		17440 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 4000 (30%)

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 data (counted in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of 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.