Radeon HD 6790 vs Radeon RX 460 2GB

Intro

Compare those specs to the Radeon RX 460 2GB, which makes use of a 14 nm design. AMD has clocked the core frequency at 1090 MHz. The GDDR5 RAM runs at a speed of 1750 MHz on this particular card. It features 896 SPUs along with 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

The Radeon HD 6790 should theoretically perform just a bit faster than the Radeon RX 460 2GB overall. (explain)

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

Texel Rate

The Radeon RX 460 2GB will be much (approximately 82%) faster with regards to anisotropic 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 is a lot (about 30%) more effective at full screen anti-aliasing than the Radeon HD 6790, and able to handle higher 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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.