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GeForce GTX 950 vs Radeon HD 3870 X2 512MB

Intro

The GeForce GTX 950 comes with a clock speed of 1024 MHz and a GDDR5 memory speed of 1652 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 768 SPUs, 48 TAUs, and 32 Raster Operation Units.

Compare all that to the Radeon HD 3870 X2 512MB, which comes with core clock speeds of 825 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs along with 16 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 3870 X2 512MB should in theory be a small bit better than the GeForce GTX 950 in general. (explain)

Radeon HD 3870 X2 512MB 115200 MB/sec
GeForce GTX 950 105728 MB/sec
Difference: 9472 (9%)

Texel Rate

The GeForce GTX 950 should be much (approximately 86%) better at AF than the Radeon HD 3870 X2 512MB. (explain)

GeForce GTX 950 49152 Mtexels/sec
Radeon HD 3870 X2 512MB 26400 Mtexels/sec
Difference: 22752 (86%)

Pixel Rate

The GeForce GTX 950 will be quite a bit (more or less 24%) faster with regards to anti-aliasing than the Radeon HD 3870 X2 512MB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 3870 X2 512MB 26400 Mpixels/sec
Difference: 6368 (24%)

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

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Radeon HD 3870 X2 512MB

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 3870 X2 512MB
Manufacturer nVidia AMD
Year August 2015 Jan 28, 2008
Code Name GM206 R680
Memory 2048 MB 512 MB (x2)
Core Speed 1024 MHz 825 MHz (x2)
Memory Speed 6608 MHz 1800 MHz (x2)
Power (Max TDP) 90 watts (Unknown) watts
Bandwidth 105728 MB/sec 115200 MB/sec
Texel Rate 49152 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 32768 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 768 320(64x5) (x2)
Texture Mapping Units 48 16 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors 2940 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/(internal PCIe 1.1 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 data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 950

Amazon.com

Check prices at:

Radeon HD 3870 X2 512MB

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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