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GeForce GTX 950 vs Radeon HD 4870 2GB

Intro

The GeForce GTX 950 comes with a GPU clock speed of 1024 MHz, and the 2048 MB of GDDR5 RAM runs at 1652 MHz through a 128-bit bus. It also is made up of 768 SPUs, 48 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 4870 2GB, which comes with a core clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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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

Theoretically speaking, the Radeon HD 4870 2GB should perform a bit faster than the GeForce GTX 950 in general. (explain)

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

Texel Rate

The GeForce GTX 950 will be a lot (approximately 64%) better at AF 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

The GeForce GTX 950 is quite a bit (approximately 173%) faster with regards to full screen anti-aliasing than the Radeon HD 4870 2GB, and also able to handle higher resolutions without slowing down too much. (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 max amount of information (in units of MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. 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 output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

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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