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GeForce GTX 950 vs Radeon HD 4790

Intro

The GeForce GTX 950 has core speeds of 1024 MHz on the GPU, and 1652 MHz on the 2048 MB of GDDR5 RAM. It features 768 SPUs as well as 48 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 4790, which comes with core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 950 is 3% faster than the Radeon HD 4790 overall, due to its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 950 should be a lot (approximately 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

The GeForce GTX 950 is quite a bit (approximately 241%) more effective at anti-aliasing than the Radeon HD 4790, and able to handle higher resolutions without slowing down too much. (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 information (measured in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that 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 Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many 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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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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