Single, dual and quad channel memory performance: More lanes, more speed?

New insights in the role of multichannel memory


Benchmarks games

Let's look at the gaming performance. We see that the IGP of the Pentium G4620 is able to perform much better due to the doubling of the memory bandwidth. The performance increase is at least 21% and in some cases can get as high as 55%. Dota 2 should be noticeably faster on Medium/High settings, since the frame rate increases from 18 to 22 fps. Still not enough to play the game smoothly, however percentage-wise this is a significant improvement. At Low settings, which is where the CPU bottleneck is the biggest, the performance increase is extreme: from 67 to 104 fps. Even though the initial frame rate was already above 60 fps, eSports gamers generally benefit a lot from the extra frames.

In Minecrafr the Pentium G4620 is also significantly faster with dual channel compared to single channel. The results are a bit more consistent however: they're around 30%. On Fast (which could be considered a Low/Medium preset) the frame rate increases from 80 to 104 fps, while on Fancy the frame rate goes from 65 to 87 fps.

Intel Pentium G4620 Single channel Dual channel Improvement
Dota 2 - 1920x1080 - Low 67 fps 104 fps 54.9%
Dota 2 - 1920x1080 - Medium/High 18 fps 22 fps 21.2%
Minecraft - 1920x1080 - Fast 80 fps 104 fps 29.4%
Minecraft - 1920x1080 - Fancy 65 fps 87 fps 34.9%
Intel Core i7 5960X Dual channel Quad channel Improvement
Battlefield 1 - 1920x1080 - Medium 116 fps 117 fps 0.3%
Battlefield 1 - 1920x1080 - Ultra 77 fps 76 fps -0.5%
GTA V - 1920x1080 - Medium 130 fps 130 fps 0.0%
GTA V - 1920x1080 - Ultra 44 fps 44 fps 0.7%

The high-end platform did not produce similar results, in fact we did not see any improvements at all. In Battlefield 1 the frame rate goes up by 1 fps, however this is well within margin of error. On Ultra there is even a small performance loss, however once again this is within margin of error. In practice it turns out that there is no discernible difference between dual or quad channel for Battlefield 1. The same goes for GTA V, where the frame rate is identical on Medium and Ultra settings.

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