Radeon HD 4850 512MB vs Radeon RX 470

Intro

Compare those specifications to the Radeon RX 470, which features core speeds of 926 MHz on the GPU, and 1650 MHz on the 8192 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB		110 Watts
Radeon RX 470		120 Watts
	Difference: 10 Watts (9%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 is 232% faster than the Radeon HD 4850 512MB in general, because of its greater bandwidth. (explain)

Radeon RX 470		211200 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 147648 (232%)

Texel Rate

The Radeon RX 470 will be much (about 374%) better at texture filtering than the Radeon HD 4850 512MB. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 93528 (374%)

Pixel Rate

The Radeon RX 470 will be a lot (about 196%) more effective at anti-aliasing than the Radeon HD 4850 512MB, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon HD 4850 512MB		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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.