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GeForce GTX 950 vs Radeon HD 4890 2GB

Intro

The GeForce GTX 950 uses a 28 nm design. nVidia has set the core speed at 1024 MHz. The GDDR5 RAM is set to run at a speed of 1652 MHz on this specific card. It features 768 SPUs as well as 48 Texture Address Units and 32 ROPs.

Compare that to the Radeon HD 4890 2GB, which has GPU clock speed of 1000 MHz, and 2048 MB of GDDR5 memory running at 975 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, 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 2GB 190 Watts
Difference: 100 Watts (111%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4890 2GB should theoretically be a small bit superior to the GeForce GTX 950 overall. (explain)

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

Texel Rate

The GeForce GTX 950 will be a lot (more or less 23%) better 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 quite a bit (more or less 105%) better at FSAA than the Radeon HD 4890 2GB, and also will be capable of handling higher resolutions while still performing well. (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

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.

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: Bandwidth is the largest amount of data (in units of MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its 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 card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

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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