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GeForce GTX 950 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 950 makes use of a 28 nm design. nVidia has clocked the core speed at 1024 MHz. The GDDR5 RAM works at a frequency of 1652 MHz on this card. It features 768 SPUs as well as 48 TAUs and 32 ROPs.

Compare all of that to the Radeon HD 4890 1GB, which uses a 55 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run at a speed of 975 MHz on this card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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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

In theory, the Radeon HD 4890 1GB is 18% quicker than the GeForce GTX 950 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX 950 should be 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 should be a lot (more or less 105%) faster with regards to anti-aliasing than the Radeon HD 4890 1GB, and also capable of handling higher resolutions without losing too much performance. (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 largest amount of data (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out 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 outputting the pixels (image) to the screen. The actual pixel output 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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