Question Dual channel plus one stick


Oct 17, 2018
I have one 2666Mhz Ram stick, and will get 2 more that are 3600Mhz (all of them are 8gb).
2666 one is Patriot and 3600 are Hyperx .
Would it work fine in dual channel and the other one only be used if needed or would it result in worse performance?


It would no longer be running in dual channel, and performance would vary from slightly worse to not functional at all.
Mixing RAM is always a gamble, even identical kits, purchased the same day, from the same retailer, might not work together.
In this case, different speeds, timings, and brands are likely to not work properly. Even if it did manage to boot, the faster kits would be slowed to match the lowest speed kit.
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Oct 17, 2018
Hey there,

No, this will not be what you expect. You should only use the 2 faster DIMMs. If you add the old 2666, you may not even be able to boot properly. Mixing ram modules is not advised.

List your full PC spec so we can advise better solution for you.

I'm keeping this:
  • NVIDIA GeForce GTX 1050 (2 GB)
  • Samsung SSD 840 EVO 120GB (120 GB, SATA-III)
  • EVGA 430W ATX
And getting this:
  • AMD RYZEN 5 5600 3.5GHz (TURBO 4.4GHz) 32MB CACHE AM4 100-100000927BOX
  • ASUS Prime - A520M-E, AMD AM4, mATX, DDR4
  • 2x Kingston Fury Beast, 8GB (1x8GB), DDR4, 3600MHz, C17, Black
  • SSD KINGSTON NV2 1TB M.2 2280, 3500MBs/2100MBs, NVME PCIE 4.0 - SNV2S/1000G
Not trying to do heavy gaming right now.
Using the DIMM with 266mhz, will mean that your CPU will default to the lowest speed part at worst. Or simply not boot at all. So you would hardly gain anything.

I'd stick with the 2 x 8gb 3600mhz and work from there. Be sure to set infinity fabric clock/mem clock/mem controller clock to 1800mhz. This means your CPU will run at it's best speed, with the least latency.