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GeForce GTX 965M vs Radeon HD 3870 X2 512MB

Intro

The GeForce GTX 965M uses a 28 nm design. nVidia has clocked the core frequency at 944 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific model. It features 1024 SPUs as well as 64 TAUs and 32 ROPs.

Compare all of that to the Radeon HD 3870 X2 512MB, which has a clock frequency of 825 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It features 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 512MB is 80% faster than the GeForce GTX 965M overall, due to its higher data rate. (explain)

Radeon HD 3870 X2 512MB 115200 MB/sec
GeForce GTX 965M 64000 MB/sec
Difference: 51200 (80%)

Texel Rate

The GeForce GTX 965M should be much (approximately 129%) faster with regards to AF than the Radeon HD 3870 X2 512MB. (explain)

GeForce GTX 965M 60416 Mtexels/sec
Radeon HD 3870 X2 512MB 26400 Mtexels/sec
Difference: 34016 (129%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 965M is a better choice, not by a very large margin though. (explain)

GeForce GTX 965M 30208 Mpixels/sec
Radeon HD 3870 X2 512MB 26400 Mpixels/sec
Difference: 3808 (14%)

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 965M

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.

Specifications

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Model GeForce GTX 965M Radeon HD 3870 X2 512MB
Manufacturer nVidia AMD
Year January 5 2015 Jan 28, 2008
Code Name GM204 R680
Memory 2048 MB 512 MB (x2)
Core Speed 944 MHz 825 MHz (x2)
Memory Speed 4000 MHz 1800 MHz (x2)
Power (Max TDP) 60 watts (Unknown) watts
Bandwidth 64000 MB/sec 115200 MB/sec
Texel Rate 60416 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 30208 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 1024 320(64x5) (x2)
Texture Mapping Units 64 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 (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 largest amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 965M

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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