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Radeon HD 4890 2GB vs Radeon RX 460

Intro

The Radeon HD 4890 2GB uses a 55 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory is set to run at a frequency of 975 MHz on this particular card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare all of that to the Radeon RX 460, which has a GPU core clock speed of 1090 MHz, and 4096 MB of GDDR5 memory set to run at 1750 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 75 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 115 Watts (153%)

Memory Bandwidth

Theoretically, the Radeon HD 4890 2GB should perform just a bit faster than the Radeon RX 460 in general. (explain)

Radeon HD 4890 2GB 124800 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 12800 (11%)

Texel Rate

The Radeon RX 460 will be quite a bit (approximately 53%) faster with regards to AF than the Radeon HD 4890 2GB. (explain)

Radeon RX 460 61040 Mtexels/sec
Radeon HD 4890 2GB 40000 Mtexels/sec
Difference: 21040 (53%)

Pixel Rate

The Radeon RX 460 is a little bit (about 9%) faster with regards to AA than the Radeon HD 4890 2GB, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 460 17440 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 1440 (9%)

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

Radeon HD 4890 2GB

Radeon RX 460

Specifications

Display Specifications

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Model Radeon HD 4890 2GB Radeon RX 460
Manufacturer AMD AMD
Year Apr 2, 2009 August 2016
Code Name RV790 XT Polaris 11
Memory 2048 MB 4096 MB
Core Speed 1000 MHz 1090 MHz
Memory Speed 3900 MHz 7000 MHz
Power (Max TDP) 190 watts 75 watts
Bandwidth 124800 MB/sec 112000 MB/sec
Texel Rate 40000 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 800(160x5) 896
Texture Mapping Units 40 56
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 14 nm
Transistors 959 million 3000 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of 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.

Radeon HD 4890 2GB

Radeon RX 460

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