Radeon HD 4870 1GB vs Radeon RX 460 2GB

Intro

Compare all that to the Radeon RX 460 2GB, which has a clock frequency of 1090 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 128-bit bus, and uses a 14 nm design. It is comprised of 896 SPUs, 56 TAUs, 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 4870 1GB		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

In theory, the Radeon HD 4870 1GB is 3% quicker than the Radeon RX 460 2GB in general, due to its higher bandwidth. (explain)

Radeon HD 4870 1GB		115200 MB/sec
Radeon RX 460 2GB		112000 MB/sec
	Difference: 3200 (3%)

Texel Rate

The Radeon RX 460 2GB is much (approximately 103%) faster with regards to anisotropic filtering than the Radeon HD 4870 1GB. (explain)

Radeon RX 460 2GB		61040 Mtexels/sec
Radeon HD 4870 1GB		30000 Mtexels/sec
	Difference: 31040 (103%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 460 2GB is superior to the Radeon HD 4870 1GB, and very much so. (explain)

Radeon RX 460 2GB		17440 Mpixels/sec
Radeon HD 4870 1GB		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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels 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 colour ROPs by the the core 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.