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Radeon HD 5850 vs Radeon RX 460

Intro

The Radeon HD 5850 has a core clock frequency of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is comprised of 1440(288x5) SPUs, 72 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon RX 460, which has GPU clock speed of 1090 MHz, and 4096 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also features 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460		75 Watts
Radeon HD 5850		151 Watts
	Difference: 76 Watts (101%)

Memory Bandwidth

Theoretically, the Radeon HD 5850 should perform a small bit faster than the Radeon RX 460 overall. (explain)

Radeon HD 5850		128000 MB/sec
Radeon RX 460		112000 MB/sec
	Difference: 16000 (14%)

Texel Rate

The Radeon RX 460 should be a bit (about 17%) faster with regards to anisotropic filtering than the Radeon HD 5850. (explain)

Radeon RX 460		61040 Mtexels/sec
Radeon HD 5850		52200 Mtexels/sec
	Difference: 8840 (17%)

Pixel Rate

The Radeon HD 5850 should be quite a bit (about 33%) faster with regards to AA than the Radeon RX 460, and should be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 5850		23200 Mpixels/sec
Radeon RX 460		17440 Mpixels/sec
	Difference: 5760 (33%)

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

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Radeon HD 5850

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Radeon RX 460

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model	Radeon HD 5850	Radeon RX 460
Manufacturer	AMD	AMD
Year	September 30, 2009	August 2016
Code Name	Cypress PRO	Polaris 11
Memory	1024 MB	4096 MB
Core Speed	725 MHz	1090 MHz
Memory Speed	4000 MHz	7000 MHz
Power (Max TDP)	151 watts	75 watts
Bandwidth	128000 MB/sec	112000 MB/sec
Texel Rate	52200 Mtexels/sec	61040 Mtexels/sec
Pixel Rate	23200 Mpixels/sec	17440 Mpixels/sec
Unified Shaders	1440(288x5)	896
Texture Mapping Units	72	56
Render Output Units	32	16
Bus Type	GDDR5	GDDR5
Bus Width	256-bit	128-bit
Fab Process	40 nm	14 nm
Transistors	2154 million	3000 million
Bus	PCIe 2.1 x16	PCIe 3.0 x16
DirectX Version	DirectX 11	DirectX 12.0
OpenGL Version	OpenGL 3.2	OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

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