Radeon HD 4870 512MB vs Radeon RX 460

Intro

Compare all of that to the Radeon RX 460, which features 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 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460		75 Watts
Radeon HD 4870 512MB		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

Theoretically, the Radeon HD 4870 512MB should perform a little bit faster than the Radeon RX 460 in general. (explain)

Radeon HD 4870 512MB		115200 MB/sec
Radeon RX 460		112000 MB/sec
	Difference: 3200 (3%)

Texel Rate

The Radeon RX 460 should be much (approximately 103%) faster with regards to AF than the Radeon HD 4870 512MB. (explain)

Radeon RX 460		61040 Mtexels/sec
Radeon HD 4870 512MB		30000 Mtexels/sec
	Difference: 31040 (103%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 460 is the winner, by far. (explain)

Radeon RX 460		17440 Mpixels/sec
Radeon HD 4870 512MB		12000 Mpixels/sec
	Difference: 5440 (45%)

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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, 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 amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.