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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 clocked the core speed at 1024 MHz. The GDDR5 memory works at a speed of 1652 MHz on this model. It features 768 SPUs as well as 48 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 4870 2GB, which comes with a core clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It is comprised 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

In theory, the Radeon HD 4870 2GB should be 9% quicker than the GeForce GTX 950 overall, due to its greater bandwidth. (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 quite a bit (approximately 64%) faster with regards to 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

If using lots of anti-aliasing is important to you, then the GeForce GTX 950 is superior to the Radeon HD 4870 2GB, 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

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.

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: Bandwidth is the largest amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, 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 maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum 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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