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GeForce GTX 950 vs Radeon HD 4790

Intro

The GeForce GTX 950 has a clock frequency of 1024 MHz and a GDDR5 memory frequency of 1652 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is made up of 768 SPUs, 48 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon HD 4790, which features core clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 950 should be 3% quicker than the Radeon HD 4790 overall, because of its higher bandwidth. (explain)

GeForce GTX 950 105728 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 3328 (3%)

Texel Rate

The GeForce GTX 950 will be quite a bit (more or less 156%) more effective at texture filtering than the Radeon HD 4790. (explain)

GeForce GTX 950 49152 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 29952 (156%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 950 is a better choice, and very much so. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 23168 (241%)

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 950

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.

Specifications

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Model GeForce GTX 950 Radeon HD 4790
Manufacturer nVidia AMD
Year August 2015 2009
Code Name GM206 RV790
Memory 2048 MB 512 MB
Core Speed 1024 MHz 600 MHz
Memory Speed 6608 MHz 3200 MHz
Power (Max TDP) 90 watts (Unknown) watts
Bandwidth 105728 MB/sec 102400 MB/sec
Texel Rate 49152 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 32768 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 768 640(128x5)
Texture Mapping Units 48 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 data (in units of MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video 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 amount 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 calculated by multiplying the amount of ROPs by the the core 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 950

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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