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GeForce GTX 950 vs Radeon HD 4870 X2

Intro

The GeForce GTX 950 features a clock frequency of 1024 MHz and a GDDR5 memory speed of 1652 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 768 SPUs, 48 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon HD 4870 X2, which comes with a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 memory running at 900 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 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 X2 350 Watts
Difference: 260 Watts (289%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 X2 should theoretically be a lot superior to the GeForce GTX 950 in general. (explain)

Radeon HD 4870 X2 230400 MB/sec
GeForce GTX 950 105728 MB/sec
Difference: 124672 (118%)

Texel Rate

The Radeon HD 4870 X2 is much (approximately 22%) better at AF than the GeForce GTX 950. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
GeForce GTX 950 49152 Mtexels/sec
Difference: 10848 (22%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 950 is the winner, by far. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 8768 (37%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 950

Amazon.com

Check prices at:

Radeon HD 4870 X2

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 X2
Manufacturer nVidia AMD
Year August 2015 Aug 12, 2008
Code Name GM206 R700
Memory 2048 MB 1024 MB (x2)
Core Speed 1024 MHz 750 MHz (x2)
Memory Speed 6608 MHz 3600 MHz (x2)
Power (Max TDP) 90 watts 350 watts
Bandwidth 105728 MB/sec 230400 MB/sec
Texel Rate 49152 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 32768 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 768 800(160x5) (x2)
Texture Mapping Units 48 40 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors 2940 million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 12.0 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total 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 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 chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - 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 4870 X2

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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