Radeon HD 4870 2GB vs Radeon RX 460

Intro

Compare all of that to the Radeon RX 460, which makes use of a 14 nm design. AMD has set the core frequency at 1090 MHz. The GDDR5 RAM works at a frequency of 1750 MHz on this specific card. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460		75 Watts
Radeon HD 4870 2GB		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

Theoretically, the Radeon HD 4870 2GB should be a bit faster than the Radeon RX 460 in general. (explain)

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

Texel Rate

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

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

Pixel Rate

The Radeon RX 460 is a lot (more or less 45%) better at AA than the Radeon HD 4870 2GB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 460		17440 Mpixels/sec
Radeon HD 4870 2GB		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 transported past the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, 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 the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.