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Radeon HD 4790 vs Radeon R7 260X

Intro

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

Compare those specs to the Radeon R7 260X, which has core clock speeds of 1100 MHz on the GPU, and 1625 MHz on the 2048 MB of GDDR5 RAM. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R7 260X should be 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 is much (approximately 221%) faster with regards to AF than the Radeon HD 4790. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R7 260X is superior to the Radeon HD 4790, by far. (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

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.

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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's 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 quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to 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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