Radeon HD 4870 1GB vs Radeon RX 460 2GB

Intro

Compare all of that to the Radeon RX 460 2GB, which comes with GPU core speed of 1090 MHz, and 2048 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also features 896 Stream Processors, 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 4870 1GB		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

Performance-wise, the Radeon HD 4870 1GB should in theory be a little bit superior to the Radeon RX 460 2GB in general. (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 will be quite a bit (approximately 103%) better at 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

The Radeon RX 460 2GB is a lot (about 45%) better at AA than the Radeon HD 4870 1GB, and will be able to handle higher resolutions without losing too much performance. (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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.