Radeon HD 4850 X2 512MB vs Radeon RX 470 4GB

Intro

Compare all that to the Radeon RX 470 4GB, which features a GPU core clock speed of 926 MHz, and 4096 MB of GDDR5 RAM set to run at 1650 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 4GB		120 Watts
Radeon HD 4850 X2 512MB		250 Watts
	Difference: 130 Watts (108%)

Memory Bandwidth

As far as performance goes, the Radeon RX 470 4GB should in theory be quite a bit superior to the Radeon HD 4850 X2 512MB overall. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon HD 4850 X2 512MB		127104 MB/sec
	Difference: 84096 (66%)

Texel Rate

The Radeon RX 470 4GB is a lot (about 137%) better at anisotropic filtering than the Radeon HD 4850 X2 512MB. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon HD 4850 X2 512MB		50000 Mtexels/sec
	Difference: 68528 (137%)

Pixel Rate

The Radeon RX 470 4GB is much (approximately 48%) better at FSAA than the Radeon HD 4850 X2 512MB, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon HD 4850 X2 512MB		20000 Mpixels/sec
	Difference: 9632 (48%)

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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better 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 number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 get to the maximum fill rate.