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GeForce GTX 950 vs Radeon HD 4870 X2

Intro

The GeForce GTX 950 makes use of a 28 nm design. nVidia has set the core speed at 1024 MHz. The GDDR5 RAM works at a frequency of 1652 MHz on this particular card. It features 768 SPUs along with 48 TAUs and 32 Rasterization Operator Units.

Compare that to the Radeon HD 4870 X2, which makes use of a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory 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 X2 350 Watts
Difference: 260 Watts (289%)

Memory Bandwidth

The Radeon HD 4870 X2, in theory, should perform a lot faster than the GeForce GTX 950 overall. (explain)

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

Texel Rate

The Radeon HD 4870 X2 should be a lot (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

The GeForce GTX 950 will be quite a bit (more or less 37%) faster with regards to AA than the Radeon HD 4870 X2, and also will be able to handle higher screen resolutions more effectively. (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 max amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 can be applied per second. This is calculated by multiplying the total amount of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write 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 core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach 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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