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GeForce GTX 950 vs Radeon HD 4890 2GB

Intro

The GeForce GTX 950 uses a 28 nm design. nVidia has clocked the core speed at 1024 MHz. The GDDR5 memory runs at a frequency of 1652 MHz on this specific model. It features 768 SPUs as well as 48 TAUs and 32 ROPs.

Compare all that to the Radeon HD 4890 2GB, which has a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM running at 975 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950 90 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 100 Watts (111%)

Memory Bandwidth

The Radeon HD 4890 2GB should in theory be just a bit faster than the GeForce GTX 950 in general. (explain)

Radeon HD 4890 2GB 124800 MB/sec
GeForce GTX 950 105728 MB/sec
Difference: 19072 (18%)

Texel Rate

The GeForce GTX 950 is a lot (approximately 23%) more effective at anisotropic filtering than the Radeon HD 4890 2GB. (explain)

GeForce GTX 950 49152 Mtexels/sec
Radeon HD 4890 2GB 40000 Mtexels/sec
Difference: 9152 (23%)

Pixel Rate

The GeForce GTX 950 will be much (more or less 105%) better at FSAA than the Radeon HD 4890 2GB, and will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 4890 2GB 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

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Radeon HD 4890 2GB

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 950 Radeon HD 4890 2GB
Manufacturer nVidia AMD
Year August 2015 Apr 2, 2009
Code Name GM206 RV790 XT
Memory 2048 MB 2048 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 maximum amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 in one second. This figure is worked out by multiplying the total 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. 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 also depends on lots of other factors, especially 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 950

Amazon.com

Check prices at:

Radeon HD 4890 2GB

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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