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GeForce GTX 980M vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 980M comes with a core clock speed of 1038 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 64 Raster Operation Units.

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

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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 980M in general, because of its higher bandwidth. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GTX 980M 128000 MB/sec
Difference: 16128 (13%)

Texel Rate

The GeForce GTX 980M is much (about 277%) faster with regards to AF than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 980M 99648 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 73248 (277%)

Pixel Rate

The GeForce GTX 980M will be a lot (more or less 152%) more effective at anti-aliasing than the Radeon HD 3870 X2 1GB, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 980M 66432 Mpixels/sec
Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Difference: 40032 (152%)

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 980M

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 980M Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year October 7 2014 Jan 28, 2008
Code Name GM204 R680
Memory 4096 MB 1024 MB (x2)
Core Speed 1038 MHz 825 MHz (x2)
Memory Speed 4000 MHz 2252 MHz (x2)
Power (Max TDP) 100 watts (Unknown) watts
Bandwidth 128000 MB/sec 144128 MB/sec
Texel Rate 99648 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 66432 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 1536 320(64x5) (x2)
Texture Mapping Units 96 16 (x2)
Render Output Units 64 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 information (measured in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 980M

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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