Question Is there any risk when using DDR3 1866 at that speed with Haswell/Devil's Canyon CPUs?

[mikeymikec]

A customer had a faulty memory module and it made more sense to replace what they had with a new pair of modules (plus the customer wanted more memory). I've installed the new modules and they were automatically recognised and ran at 1866 without any further configuration. However, I notice that the i5-4690k has a DDR3-1333/1600 memory controller, and I assumed that sticking in faster memory would make little difference and simply be run at 1600MHz until configured otherwise.

No overclocking of anything going on.

 

[ao_ika_red]

I believe nutters in this forum already pushed DDR3 limit beyond 2400 with Haswell chip in its heyday. So 1866 shouldn't be an issue, I guess.

 

[razel]

No issues with 1866. If it doesn't support 1866, it'll try to run it 1600 or 1333. Whatever the SPD timings are programmed on the RAM. And sadly you won't notice much difference either. You can absolutely benchmark the difference in memory bandwidth, but in the real world, they won't notice.