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Radeon HD 4790 vs Radeon R7 260X

Intro

The Radeon HD 4790 uses a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR5 RAM works at a frequency of 800 MHz on this particular card. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.

Compare all of that to the Radeon R7 260X, which comes with a core clock frequency of 1100 MHz and a GDDR5 memory frequency of 1625 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R7 260X is 2% quicker than the Radeon HD 4790 overall, due to its higher bandwidth. (explain)

Radeon R7 260X 104000 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 1600 (2%)

Texel Rate

The Radeon R7 260X will be a lot (about 221%) more effective at anisotropic filtering than the Radeon HD 4790. (explain)

Radeon R7 260X 61600 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 42400 (221%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R7 260X is the winner, and very much so. (explain)

Radeon R7 260X 17600 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 8000 (83%)

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

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Radeon R7 260X

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 R7 260X
Manufacturer AMD AMD
Year 2009 October 2013
Code Name RV790 Bonaire XTX
Memory 512 MB 2048 MB
Core Speed 600 MHz 1100 MHz
Memory Speed 3200 MHz 6500 MHz
Power (Max TDP) (Unknown) watts 115 watts
Bandwidth 102400 MB/sec 104000 MB/sec
Texel Rate 19200 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 17600 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 28 nm
Transistors 959 million 2080 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few 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 R7 260X

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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