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GeForce GTX 960 vs Radeon HD 4790

Intro

The GeForce GTX 960 has a core clock speed of 1127 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon HD 4790, which features a clock frequency of 600 MHz and a GDDR5 memory speed of 800 MHz. It also uses 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.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 960 should in theory be a bit better than the Radeon HD 4790 in general. (explain)

GeForce GTX 960 112000 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 9600 (9%)

Texel Rate

The GeForce GTX 960 should be a lot (more or less 276%) more effective at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 960 72128 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 52928 (276%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 960 is a better choice, by a large margin. (explain)

GeForce GTX 960 36064 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 26464 (276%)

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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GeForce GTX 960

Amazon.com

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Radeon HD 4790

Amazon.com

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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 GeForce GTX 960 Radeon HD 4790
Manufacturer nVidia AMD
Year January 2015 2009
Code Name GM206 RV790
Memory 2048 MB 512 MB
Core Speed 1127 MHz 600 MHz
Memory Speed 7000 MHz 3200 MHz
Power (Max TDP) 120 watts (Unknown) watts
Bandwidth 112000 MB/sec 102400 MB/sec
Texel Rate 72128 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 36064 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 1024 640(128x5)
Texture Mapping Units 64 32
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 2940 million 959 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 12.0 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTX 960

Amazon.com

Check prices at:

Radeon HD 4790

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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