Radeon HD 4850 2GB vs Radeon RX 460

Intro

Compare all that to the Radeon RX 460, which comes with clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460		75 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 35 Watts (47%)

Memory Bandwidth

In theory, the Radeon RX 460 should be 76% faster than the Radeon HD 4850 2GB overall, due to its higher data rate. (explain)

Radeon RX 460		112000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 48448 (76%)

Texel Rate

The Radeon RX 460 is much (more or less 144%) faster with regards to texture filtering than the Radeon HD 4850 2GB. (explain)

Radeon RX 460		61040 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 36040 (144%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 460 is superior to the Radeon HD 4850 2GB, by a large margin. (explain)

Radeon RX 460		17440 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 7440 (74%)

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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.