Radeon HD 4890 2GB vs Radeon RX 460

Intro

Compare all of that to the Radeon RX 460, which features core clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460		75 Watts
Radeon HD 4890 2GB		190 Watts
	Difference: 115 Watts (153%)

Memory Bandwidth

Theoretically, the Radeon HD 4890 2GB should perform a small bit faster than the Radeon RX 460 in general. (explain)

Radeon HD 4890 2GB		124800 MB/sec
Radeon RX 460		112000 MB/sec
	Difference: 12800 (11%)

Texel Rate

The Radeon RX 460 will be a lot (more or less 53%) faster with regards to anisotropic filtering than the Radeon HD 4890 2GB. (explain)

Radeon RX 460		61040 Mtexels/sec
Radeon HD 4890 2GB		40000 Mtexels/sec
	Difference: 21040 (53%)

Pixel Rate

The Radeon RX 460 should be a small bit (more or less 9%) faster with regards to AA than the Radeon HD 4890 2GB, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 460		17440 Mpixels/sec
Radeon HD 4890 2GB		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 max amount of data (measured in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.