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GeForce GTX 950 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 950 features core clock speeds of 1024 MHz on the GPU, and 1652 MHz on the 2048 MB of GDDR5 memory. It features 768 SPUs along with 48 TAUs and 32 ROPs.

Compare all that to the Radeon HD 4890 1GB, which has a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 memory set to run at 975 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950 90 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 100 Watts (111%)

Memory Bandwidth

Theoretically, the Radeon HD 4890 1GB should perform just a bit faster than the GeForce GTX 950 in general. (explain)

Radeon HD 4890 1GB 124800 MB/sec
GeForce GTX 950 105728 MB/sec
Difference: 19072 (18%)

Texel Rate

The GeForce GTX 950 is quite a bit (approximately 23%) more effective at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX 950 49152 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 9152 (23%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 950 is the winner, by a large margin. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 16768 (105%)

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 4890 1GB

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 4890 1GB
Manufacturer nVidia AMD
Year August 2015 Apr 2, 2009
Code Name GM206 RV790 XT
Memory 2048 MB 1024 MB
Core Speed 1024 MHz 1000 MHz
Memory Speed 6608 MHz 3900 MHz
Power (Max TDP) 90 watts 190 watts
Bandwidth 105728 MB/sec 124800 MB/sec
Texel Rate 49152 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 32768 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 768 800(160x5)
Texture Mapping Units 48 40
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. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 max fill rate.

Display Prices

Hide Prices

GeForce GTX 950

Amazon.com

Check prices at:

Radeon HD 4890 1GB

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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