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GeForce GTX 950 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 950 uses a 28 nm design. nVidia has clocked the core speed at 1024 MHz. The GDDR5 RAM is set to run at a speed of 1652 MHz on this model. It features 768 SPUs along with 48 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 4890 1GB, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 975 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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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

As far as performance goes, the Radeon HD 4890 1GB should theoretically be a small bit better 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 much (about 23%) faster with regards to texture 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

The GeForce GTX 950 will be a lot (more or less 105%) faster with regards to full screen anti-aliasing than the Radeon HD 4890 1GB, and also capable of handling higher screen resolutions more effectively. (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: Bandwidth is the maximum amount of information (measured in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 maximum fill rate.

Display Prices

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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.

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