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Radeon HD 4790 vs Radeon RX 460

Intro

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

Compare those specifications to the Radeon RX 460, which makes use of a 14 nm design. AMD has clocked the core frequency at 1090 MHz. The GDDR5 memory is set to run at a speed of 1750 MHz on this particular card. It features 896 SPUs along with 56 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon RX 460 should in theory be just a bit superior to the Radeon HD 4790 in general. (explain)

Radeon RX 460 112000 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 9600 (9%)

Texel Rate

The Radeon RX 460 will be a lot (more or less 218%) faster with regards to AF than the Radeon HD 4790. (explain)

Radeon RX 460 61040 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 41840 (218%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 460 is a better choice, by a large margin. (explain)

Radeon RX 460 17440 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 7840 (82%)

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 460

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 460
Manufacturer AMD AMD
Year 2009 August 2016
Code Name RV790 Polaris 11
Memory 512 MB 4096 MB
Core Speed 600 MHz 1090 MHz
Memory Speed 3200 MHz 7000 MHz
Power (Max TDP) (Unknown) watts 75 watts
Bandwidth 102400 MB/sec 112000 MB/sec
Texel Rate 19200 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 640(128x5) 896
Texture Mapping Units 32 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 max amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 4790

Amazon.com

Check prices at:

Radeon RX 460

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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