Ah you'd have better asked in AMD Ryzen. Didn't see this here.

Try the latest Beta BIOS and the latest 'final release'.

Lets say you don't touch ram and let it default to 2667/2400 will the PC boot with IF set to 1900?

Basically there could be a few things you could try to do.

You could try different VSoC voltages between 1.075 and 1.125V.
Then since you have an 5800x you'd want to set VDDG CCD to something between 0.950 and 0.975V (if you have 2 ccd's can try adding another 0.05 to the max end but that's irrelevant for your 5800x)
VDDG IOD you'll have to set to 0.950-0.975V (sometimes up to 1.050V can work as a failsave or if ram got a2/b2 pcb (which you do not))
VDDP (unrelated to IF as this is the physical layer from IOD to DDR) should work at 0.900V. Don't set this too high. You can try to adjust this +-0.015 but usually thats not necessary at these RAM speeds.

make sure work out the voltages you need for your IF to do 1900 stable first.
after that you do ram.

perhaps you didn't set procotd, rtt's, cad's last time? could be the board setting something wrong there on default

ProcODT 32-36.9 should be your range, 32 will do for 99%.
RTT's (nom, wr, park) are 0,0,5 for 2*8GB and 0,3,1 for 2*16GB (with higher frequencies you might wanna try 7,3,1 or 5,3,1 as well.
CAD's all four to 24 (for 0,0,5 or 0,3,1 respectively)... E-Dies are super simple with that.

Is it okay to ask if anyone overclock their XLR8 Gaming EPIC-X RGB DDR4 3200MHz? Would love to see your settings.

Its micron memory

yimingwuzere
If 3800 ram is working with a lower IF then the problem is not the ram.

So you'd have to see if you can tweak voltages as above so you hit the sweet spot and it might start working.

But tbh... at the rate they release new BIOS' (and each of them can change the voltage required theoretically, happened with zen2 quite a bit) ... just run 3733 1:1:1 call it a day and update BIOS mid 2021 n try again then.

Differences super marginal anyways.

You should really not put too much trust into the ryzen timing'calc'.
It's not a real calculator as such and hence most of the values proposed are quite shitty.

I think I have described that part up there well enough.
More than often less voltage is better for stability.

You will always have a window where everything will be working smooth.
And based on alot variables this can be large, small or simply non existent.

Hi guys,

Just rejoined AMD club after more than a decade lol.

Since I'm on stock cooler, not messing with the cpu freqs, just adjusted the curve optimizer per core. Waiting for my waterblock to arrive hehe

IF wise, I can go only up to 1866Mhz. Tried every VSOC and both VDDG possible ranges and still cant post at 1900Mhz. Prolly have to wait on any new bios updates for my B550i AX.

RAM wise, I'm using 2x16GB of Corsair LPX rev 3.44. Thaiphoon indicated Micron Rev B 16Gb chips and there's no starting point available in the DRAM Calc for the target freq (3733Mhz since my IF can only max at 1866Mhz).

So while keeping the VDIMM at 1.35v, VSOC at 1.1v, both VDDG at 0.95v and VDDP at 0.9v, I did the old skool way. Tighten the each timings to get the lowest possible POST,  MemTest86 1pass to find errors, if get errors than back up one bit, then rinse and repeat for each.

This is what I get, tested via the bootable Memtest86 standard 4 passes.

[attachmentid=10773948]

I guess this good enough? Wondering if I can do something with the resistance stuff (ProcODT & DriveStrengths) to get better primaries, 18-21-17-33 looks weird, but hey it works

Generally for KLEVV Bolt/CRAS,
Lower than DDR4-3200 is AFR/MFR
3200-3466 is CJR
3600-4000 is DJR

Sources:
https://www.hardwareluxx.de/community/threa...0jJUJeKDeRs7XiM
https://forums.hardwarezone.com.sg/threads/...memory.6029729/
https://www.win-raid.com/t8138f51-Review-Kl...KD-AGU-A-U.html

Hi any sifu can recommend me some cheap ram that can be overclocked slightly?
Is there a way to get these samsung micron die in Malaysia?

edit: For ryzen 5 series, looking at 8gb x2, not interested in rgb and bling bling just pure performance thanks