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Radeon HD 4890 1GB vs Radeon RX 460


Intro

The Radeon HD 4890 1GB comes with a clock frequency of 1000 MHz and a GDDR5 memory frequency of 975 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 75 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 115 Watts (153%)

Memory Bandwidth

The Radeon HD 4890 1GB, in theory, should be just a bit faster than the Radeon RX 460 in general. (explain)

Radeon HD 4890 1GB 124800 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 12800 (11%)

Texel Rate

The Radeon RX 460 is a lot (about 53%) faster with regards to anisotropic filtering than the Radeon HD 4890 1GB. (explain)

Radeon RX 460 61040 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 21040 (53%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 460 is superior to the Radeon HD 4890 1GB, but it probably won't make a huge difference. (explain)

Radeon RX 460 17440 Mpixels/sec
Radeon HD 4890 1GB 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 1GB

Radeon RX 460

Specifications

Display Specifications

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Model Radeon HD 4890 1GB Radeon RX 460
Manufacturer AMD AMD
Year Apr 2, 2009 August 2016
Code Name RV790 XT Polaris 11
Memory 1024 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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core 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 a second.

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

Radeon HD 4890 1GB

Radeon RX 460

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