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GeForce GTX 950 vs Radeon HD 4870 2GB

Intro

The GeForce GTX 950 makes use of a 28 nm design. nVidia has set the core frequency at 1024 MHz. The GDDR5 memory is set to run at a speed of 1652 MHz on this card. It features 768 SPUs along with 48 Texture Address Units and 32 ROPs.

Compare all of that to the Radeon HD 4870 2GB, which makes use of a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 RAM runs at a speed of 900 MHz on this model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950 90 Watts
Radeon HD 4870 2GB 150 Watts
Difference: 60 Watts (67%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 2GB should theoretically be a bit better than the GeForce GTX 950 overall. (explain)

Radeon HD 4870 2GB 115200 MB/sec
GeForce GTX 950 105728 MB/sec
Difference: 9472 (9%)

Texel Rate

The GeForce GTX 950 should be quite a bit (approximately 64%) more effective at texture filtering than the Radeon HD 4870 2GB. (explain)

GeForce GTX 950 49152 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 19152 (64%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 950 is a better choice, and very much so. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 20768 (173%)

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 4870 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 4870 2GB
Manufacturer nVidia AMD
Year August 2015 Jun 25, 2008
Code Name GM206 RV770 XT
Memory 2048 MB 2048 MB
Core Speed 1024 MHz 750 MHz
Memory Speed 6608 MHz 3600 MHz
Power (Max TDP) 90 watts 150 watts
Bandwidth 105728 MB/sec 115200 MB/sec
Texel Rate 49152 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 32768 Mpixels/sec 12000 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 956 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 information (counted in MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 are processed per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 950

Amazon.com

Check prices at:

Radeon HD 4870 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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