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GeForce 930M vs Radeon HD 3870 X2 512MB

Intro

The GeForce 930M comes with a core clock speed of 928 MHz and a DDR3 memory frequency of 900 MHz. It also uses a 64-bit bus, and uses a 28 nm design. It is comprised of 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Compare those specifications to the Radeon HD 3870 X2 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 825 MHz. The GDDR3 memory runs at a frequency of 900 MHz on this card. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 3870 X2 512MB should perform quite a bit faster than the GeForce 930M in general. (explain)

Radeon HD 3870 X2 512MB 115200 MB/sec
GeForce 930M 14400 MB/sec
Difference: 100800 (700%)

Texel Rate

The Radeon HD 3870 X2 512MB is a bit (more or less 19%) more effective at texture filtering than the GeForce 930M. (explain)

Radeon HD 3870 X2 512MB 26400 Mtexels/sec
GeForce 930M 22272 Mtexels/sec
Difference: 4128 (19%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 3870 X2 512MB is the winner, and very much so. (explain)

Radeon HD 3870 X2 512MB 26400 Mpixels/sec
GeForce 930M 7424 Mpixels/sec
Difference: 18976 (256%)

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 930M

Amazon.com

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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 930M Radeon HD 3870 X2 512MB
Manufacturer nVidia AMD
Year March 12 2015 Jan 28, 2008
Code Name GM108 R680
Memory 2048 MB 512 MB (x2)
Core Speed 928 MHz 825 MHz (x2)
Memory Speed 1800 MHz 1800 MHz (x2)
Power (Max TDP) (Unknown) watts (Unknown) watts
Bandwidth 14400 MB/sec 115200 MB/sec
Texel Rate 22272 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 7424 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 384 320(64x5) (x2)
Texture Mapping Units 24 16 (x2)
Render Output Units 8 16 (x2)
Bus Type DDR3 GDDR3
Bus Width 64-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 information (measured in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 processed in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per 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 - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 930M

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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