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GeForce GTX 880M vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 880M has core clock speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Compare those specifications to the Radeon HD 3870 X2 1GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 825 MHz. The GDDR4 RAM runs at a frequency of 1126 MHz on this specific model. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3870 X2 1GB will be 13% faster than the GeForce GTX 880M in general, due to its greater data rate. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GTX 880M 128000 MB/sec
Difference: 16128 (13%)

Texel Rate

The GeForce GTX 880M is much (approximately 363%) faster with regards to anisotropic filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 95712 (363%)

Pixel Rate

The GeForce GTX 880M should be a small bit (about 16%) better at AA than the Radeon HD 3870 X2 1GB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Difference: 4128 (16%)

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 880M

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 880M Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year March 12 2014 Jan 28, 2008
Code Name GK104 R680
Memory 4096 MB 1024 MB (x2)
Core Speed 954 MHz 825 MHz (x2)
Memory Speed 4000 MHz 2252 MHz (x2)
Power (Max TDP) 130 watts (Unknown) watts
Bandwidth 128000 MB/sec 144128 MB/sec
Texel Rate 122112 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 1536 320(64x5) (x2)
Texture Mapping Units 128 16 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 256-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 data (in units of MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 880M

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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