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GeForce GTX 750 Ti vs Radeon HD 4790

Intro

The GeForce GTX 750 Ti has a GPU clock speed of 1020 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1350 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon HD 4790, which comes with a GPU core clock speed of 600 MHz, and 512 MB of GDDR5 RAM running at 800 MHz through a 256-bit bus. It also is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4790, in theory, should perform just a bit faster than the GeForce GTX 750 Ti overall. (explain)

Radeon HD 4790 102400 MB/sec
GeForce GTX 750 Ti 86400 MB/sec
Difference: 16000 (19%)

Texel Rate

The GeForce GTX 750 Ti is a lot (about 113%) better at texture filtering than the Radeon HD 4790. (explain)

GeForce GTX 750 Ti 40800 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 21600 (113%)

Pixel Rate

The GeForce GTX 750 Ti will be much (about 70%) better at AA than the Radeon HD 4790, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 750 Ti 16320 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 6720 (70%)

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 750 Ti

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 750 Ti Radeon HD 4790
Manufacturer nVidia AMD
Year February 2014 2009
Code Name GM107 RV790
Memory 2048 MB 512 MB
Core Speed 1020 MHz 600 MHz
Memory Speed 5400 MHz 3200 MHz
Power (Max TDP) 60 watts (Unknown) watts
Bandwidth 86400 MB/sec 102400 MB/sec
Texel Rate 40800 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 16320 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 640 640(128x5)
Texture Mapping Units 40 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 1870 million 959 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.4 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 750 Ti

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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