FCLK ideally runs at half the memory speed and in sync, as a general rule. So memory running DDR@3200 will have FCLK of @1600. The FCLK is the speed of the memory controller, the Infinity Fabric and actually the RAM memory, however the RAM memory is read twice per cycle and therefore FLCK of 1600 is DDR@3200 speed.
That explained, going to talk with memory speeds and assume the above rule with FCLK (is half and synced) from now on.
In the above graphic, the line in the sand sits DDR@3800 to maintain 1:1 sync ratio however Dark Hero motherboard, Ryzen 5000 series and G.Skill kit have pushed this line to DDR@4000 and few people that are good at overclocking game on other systems and there maybe other appoved systems (not kept following consider this general information about the top of the line being DDR@4000). Your system can run upwards to least DDR@4800 however it comes with using 2:1 divide and this makes for a latency penalty in the Infinity Fabric (ie: not worth running or considering). I have run my system to DDR@4800 2:1 with my old samsung b-die (not the ones currently use) and the graph suggests AMD ran to DDR@5133 ?2:1? on Ryzen 3000 series.
For gaming (for best FPS results), you will want
2xDual Rank (DR) memory kit; or
4xSingle Rank (SR) memory kit
So of the kits you have selected they are both top tier (4xSR Samsung B-die kits) and you should be able to run DDR@3800 one without issue. Since I own DDR3800 one and fair few others, if you want to save coin and see very little difference get DDR@3600 2xDR or 4xSR at lowest CL willing to pay (think that is CL14) or if money is no object consider your current selection of DDR@3800 CL14. I would not consider the DDR@4000 or higher, myself however I did find this information (graphic below) which suggest the Infinity Fabric changes in 5000 series support higher DDR@4000 speed (note the Good luck! on the slide).
Hope you find this helpful.
That explained, going to talk with memory speeds and assume the above rule with FCLK (is half and synced) from now on.
In the above graphic, the line in the sand sits DDR@3800 to maintain 1:1 sync ratio however Dark Hero motherboard, Ryzen 5000 series and G.Skill kit have pushed this line to DDR@4000 and few people that are good at overclocking game on other systems and there maybe other appoved systems (not kept following consider this general information about the top of the line being DDR@4000). Your system can run upwards to least DDR@4800 however it comes with using 2:1 divide and this makes for a latency penalty in the Infinity Fabric (ie: not worth running or considering). I have run my system to DDR@4800 2:1 with my old samsung b-die (not the ones currently use) and the graph suggests AMD ran to DDR@5133 ?2:1? on Ryzen 3000 series.
For gaming (for best FPS results), you will want
2xDual Rank (DR) memory kit; or
4xSingle Rank (SR) memory kit
So of the kits you have selected they are both top tier (4xSR Samsung B-die kits) and you should be able to run DDR@3800 one without issue. Since I own DDR3800 one and fair few others, if you want to save coin and see very little difference get DDR@3600 2xDR or 4xSR at lowest CL willing to pay (think that is CL14) or if money is no object consider your current selection of DDR@3800 CL14. I would not consider the DDR@4000 or higher, myself however I did find this information (graphic below) which suggest the Infinity Fabric changes in 5000 series support higher DDR@4000 speed (note the Good luck! on the slide).
Hope you find this helpful.
