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GeForce GTX 860M vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 860M has a GPU core clock speed of 797 MHz, and the 4096 MB of GDDR5 memory runs at 1000 MHz through a 128-bit bus. It also features 1152 Stream Processors, 96 TAUs, and 16 ROPs.

Compare that to the Radeon HD 3870 X2 1GB, which features a clock speed of 825 MHz and a GDDR4 memory frequency of 1126 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 3870 X2 1GB should perform quite a bit faster than the GeForce GTX 860M in general. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 80128 (125%)

Texel Rate

The GeForce GTX 860M will be much (about 190%) faster with regards to anisotropic filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 50112 (190%)

Pixel Rate

The Radeon HD 3870 X2 1GB is quite a bit (about 107%) faster with regards to full screen anti-aliasing than the GeForce GTX 860M, and will be capable of handling higher resolutions better. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 13648 (107%)

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 860M

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

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 860M Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year March 12 2014 Jan 28, 2008
Code Name GM107 R680
Memory 4096 MB 1024 MB (x2)
Core Speed 797 MHz 825 MHz (x2)
Memory Speed 4000 MHz 2252 MHz (x2)
Power (Max TDP) 45 watts (Unknown) watts
Bandwidth 64000 MB/sec 144128 MB/sec
Texel Rate 76512 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 1152 320(64x5) (x2)
Texture Mapping Units 96 16 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, 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 amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

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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