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GeForce GTX 880M vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 880M has a core clock speed of 954 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1536 SPUs, 128 TAUs, and 32 ROPs.

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

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3870 X2 1GB should be 13% quicker than the GeForce GTX 880M overall, because of its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 880M will be quite a bit (more or less 363%) more effective at AF 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 just a bit (about 16%) faster with regards to full screen anti-aliasing than the Radeon HD 3870 X2 1GB, and capable of handling higher screen resolutions more effectively. (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

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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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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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.

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