Radeon HD 4870 X2 vs Radeon RX 460 2GB

Intro

Compare all that to the Radeon RX 460 2GB, which features GPU core speed of 1090 MHz, and 2048 MB of GDDR5 memory set to run at 1750 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 275 Watts (367%)

Memory Bandwidth

The Radeon HD 4870 X2 should theoretically perform quite a bit faster than the Radeon RX 460 2GB in general. (explain)

Radeon HD 4870 X2		230400 MB/sec
Radeon RX 460 2GB		112000 MB/sec
	Difference: 118400 (106%)

Texel Rate

The Radeon RX 460 2GB should be a small bit (approximately 2%) better at anisotropic filtering than the Radeon HD 4870 X2. (explain)

Radeon RX 460 2GB		61040 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 1040 (2%)

Pixel Rate

The Radeon HD 4870 X2 will be quite a bit (more or less 38%) more effective at AA than the Radeon RX 460 2GB, and also should be capable of handling higher resolutions better. (explain)

Radeon HD 4870 X2		24000 Mpixels/sec
Radeon RX 460 2GB		17440 Mpixels/sec
	Difference: 6560 (38%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.