Radeon HD 7790 vs Radeon RX 460 2GB

Intro

Compare those specs to the Radeon RX 460 2GB, which has a core clock frequency of 1090 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 128-bit memory bus, and uses a 14 nm design. It is comprised of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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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

Theoretically speaking, the Radeon RX 460 2GB will be 17% quicker than the Radeon HD 7790 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon RX 460 2GB will be a small bit (about 9%) better at AF 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 using lots of anti-aliasing is important to you, then the Radeon RX 460 2GB is the winner, but it probably won't make a huge difference. (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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.