Radeon HD 4850 2GB vs Radeon RX 470

Intro

Compare all that to the Radeon RX 470, which has a GPU core clock speed of 926 MHz, and 8192 MB of GDDR5 RAM set to run at 1650 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB		110 Watts
Radeon RX 470		120 Watts
	Difference: 10 Watts (9%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 should be a lot faster than the Radeon HD 4850 2GB in general. (explain)

Radeon RX 470		211200 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 147648 (232%)

Texel Rate

The Radeon RX 470 is quite a bit (more or less 374%) faster with regards to AF than the Radeon HD 4850 2GB. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 93528 (374%)

Pixel Rate

The Radeon RX 470 is a lot (more or less 196%) faster with regards to full screen anti-aliasing than the Radeon HD 4850 2GB, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 19632 (196%)

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 max amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.