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Radeon HD 4790 vs Radeon RX 560

Intro

The Radeon HD 4790 features a clock frequency of 600 MHz and a GDDR5 memory frequency of 800 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It features 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Compare all of that to the Radeon RX 560, which makes use of a 14 nm design. AMD has clocked the core frequency at 1175 MHz. The GDDR5 RAM is set to run at a speed of 7000 MHz on this particular card. It features 1024 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon RX 560 should be a small bit faster than the Radeon HD 4790 overall. (explain)

Radeon RX 560 114688 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 12288 (12%)

Texel Rate

The Radeon RX 560 should be quite a bit (more or less 292%) better at anisotropic filtering than the Radeon HD 4790. (explain)

Radeon RX 560 75200 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 56000 (292%)

Pixel Rate

The Radeon RX 560 should be a lot (more or less 96%) better at AA than the Radeon HD 4790, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 560 18800 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 9200 (96%)

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 4790

Amazon.com

Check prices at:

Radeon RX 560

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 4790 Radeon RX 560
Manufacturer AMD AMD
Year 2009 May 2017
Code Name RV790 Baffin
Memory 512 MB 4096 MB
Core Speed 600 MHz 1175 MHz
Memory Speed 3200 MHz 28000 MHz
Power (Max TDP) (Unknown) watts 80 watts
Bandwidth 102400 MB/sec 114688 MB/sec
Texel Rate 19200 Mtexels/sec 75200 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 18800 Mpixels/sec
Unified Shaders 640(128x5) 1024
Texture Mapping Units 32 64
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 4.6

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum 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 this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4790

Amazon.com

Check prices at:

Radeon RX 560

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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