Radeon HD 7790 vs Radeon RX 460 2GB

Intro

Compare that to the Radeon RX 460 2GB, which makes use of a 14 nm design. AMD has set the core speed at 1090 MHz. The GDDR5 memory runs at a speed of 1750 MHz on this model. It features 896 SPUs as well as 56 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon HD 7790		85 Watts
	Difference: 10 Watts (13%)

Memory Bandwidth

As far as performance goes, the Radeon RX 460 2GB should theoretically be a small bit better than the Radeon HD 7790 overall. (explain)

Radeon RX 460 2GB		112000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 16000 (17%)

Texel Rate

The Radeon RX 460 2GB is a little bit (about 9%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

Radeon RX 460 2GB		61040 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 5040 (9%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 460 2GB is the winner, though not by far. (explain)

Radeon RX 460 2GB		17440 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 1440 (9%)

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 information (in units of MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number 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 worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.