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Radeon HD 4890 1GB vs Radeon RX 460 2GB

Intro

The Radeon HD 4890 1GB has core clock speeds of 1000 MHz on the GPU, and 975 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Compare those specifications to the Radeon RX 460 2GB, which features GPU core speed of 1090 MHz, and 2048 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB 75 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 115 Watts (153%)

Memory Bandwidth

Theoretically, the Radeon HD 4890 1GB should perform a small bit faster than the Radeon RX 460 2GB overall. (explain)

Radeon HD 4890 1GB 124800 MB/sec
Radeon RX 460 2GB 112000 MB/sec
Difference: 12800 (11%)

Texel Rate

The Radeon RX 460 2GB will be a lot (approximately 53%) more effective at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

Radeon RX 460 2GB 61040 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 21040 (53%)

Pixel Rate

The Radeon RX 460 2GB will be a small bit (more or less 9%) more effective at anti-aliasing than the Radeon HD 4890 1GB, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon RX 460 2GB 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

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Radeon HD 4890 1GB

Amazon.com

Check prices at:

Radeon RX 460 2GB

Amazon.com

Check prices at:

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 4890 1GB Radeon RX 460 2GB
Manufacturer AMD AMD
Year Apr 2, 2009 August 2016
Code Name RV790 XT Polaris 11
Memory 1024 MB 2048 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 max amount of information (in units of MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4890 1GB

Amazon.com

Check prices at:

Radeon RX 460 2GB

Amazon.com

Check prices at:

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.

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