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Radeon HD 4790 vs Radeon RX 460

Intro

The Radeon HD 4790 makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The GDDR5 RAM works at a speed of 800 MHz on this specific card. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Compare that to the Radeon RX 460, which comes with clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon RX 460 should in theory perform a bit faster than the Radeon HD 4790 overall. (explain)

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

Texel Rate

The Radeon RX 460 is quite a bit (more or less 218%) better at AF than the Radeon HD 4790. (explain)

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

Pixel Rate

The Radeon RX 460 will be much (more or less 82%) better at anti-aliasing than the Radeon HD 4790, and will be able to handle higher resolutions more effectively. (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: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the 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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