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Radeon HD 4790 vs Radeon RX 560

Intro

The Radeon HD 4790 features a clock speed of 600 MHz and a GDDR5 memory speed of 800 MHz. It also features a 256-bit bus, and uses a 55 nm design. It is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon RX 560, which has core clock speeds of 1175 MHz on the GPU, and 7000 MHz on the 4096 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon RX 560 should theoretically be just a bit better than the Radeon HD 4790 in general. (explain)

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

Texel Rate

The Radeon RX 560 will be much (about 292%) more effective at texture 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 much (approximately 96%) faster with regards to FSAA than the Radeon HD 4790, and also should be capable of handling higher screen resolutions without slowing down too much. (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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that are processed per second. This 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. 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 also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum 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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