5700X Fails To Reach 3800mhz Ram Speed

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Priller

[H]ard|Gawd
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Specs: 5700X, X470 CH7, 4 x 8GB Flare X (Samsung B Die)

After a good bit of testing I am unable to get ram speeds up to 3800. Even 3733 is a struggle.
3400 CL14 at 1.4 VDIMM with all voltages pretty low is easy but at 3600 CL15 it spits out WHEA errors at a good rate.
Ive tried VDIMM up to 1.5V, SOC voltage up to 1.2V, VDDG CCD/IOD to 1.075, and cLDO VDDP up to 1.050.

As a test I set primaries to 22 with everything on auto and I can get a boot and post at 3733 with 1.2V SOC but no boot at 3800 regardless of what I do.

Anyone got a similar combination able to point me in the right direction or am I missing something?
 
Try with 2 sticks. 4 sticks is going to be hard to get that high of speed.
 
Is the ram single or dual ranked? I agree 4 sticks is more stressful on the IMC when it comes to O/Cing. Have you used the Ryzen DRAM Calculator? Check the loose or stable timings vs what you have set. How are temps and your PSU voltages? Stable under heavy load?
 
Single sided dims. I don't let ram temps exceed 50C. Everything else seems normal. I pulled the timings and voltages directly from Ryzen Dram Calculator. I even tried a mix of looser timings meant for 3800 at 3733 and it continually spits out WHEA errors.

I have updated the bios, as I was 1 behind, and so far 3533 CL14 @ 1.4V, SOC 1.1V, seems stable. Trying the slow approach now to see if I can find the 1 subtiming or voltage it didnt like before.
 
Priller said:
Single sided dims. I don't let ram temps exceed 50C. Everything else seems normal. I pulled the timings and voltages directly from Ryzen Dram Calculator. I even tried a mix of looser timings meant for 3800 at 3733 and it continually spits out WHEA errors.

I have updated the bios, as I was 1 behind, and so far 3533 CL14 @ 1.4V, SOC 1.1V, seems stable. Trying the slow approach now to see if I can find the 1 subtiming or voltage it didnt like before.
Click to expand...
You seem to be on the right track? Is this b die if so don't be afraid of voltages. If temps are kept in check you can push closer to 1.5 volts. My 2x8gb kit needs 1.475v to do tight timings at ddr4 3600mhz. I would focus on on this 1:1 infinity fabric and keep timings as tight you can do
 
The jump from 3533 to 3600 required 1.45 VDIMM, and a bump to 1.125V SOC. The culprit was that tRCDRD has to be 15 or no amount of voltage will fix it.

The timings are OCCT stable at 3600 CL14 with the generic B Die tightened subtimings. Ill start pulling back voltage to get a baseline for 3600 before trying to go to 3733 again.
 

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My 5600X has a real hard time pushing 4 sticks past 3666, but can drive 2 sticks to 2100, 2000 stable. My 5900 can run 4 sticks no problem. I think maybe the single ccd chips have a hard time with 4 sticks
 
The CH7 is Daisy Chain Topology so it favors 2 sticks. Even with B-Die. I think chasing that 3800 is a battle lost with 4 sticks.

Also, make sure you have your DRAM boot voltage set high enough as well. It is a different setting than the normal DRAM voltage.

Oh, also...isn't there a bug where you can't do 15-15-15? Only 16-15-15? Unless they fixed that in recent AGESA, not sure. My 4x8GB GSkill 3600 15-15-15-35 only work at-16-15-15-35 @ 3600 on my CH7. I have a 3900X though if it matters.
 
As bluestang said, chasing 3800 is a battle I have lost.
I hit a brick wall at 3666 even with 1.5VDIMM, 1.2 SOC, etc. Not sure if I need more VDIMM or SOC to go that fast or if the memory controller or board is holding it back.

3600 CL14 is where it will have to remain for now. In the process of driving down subtimings and voltages and over time Ill see how far I can get them.
 

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You have the latest BIOS with AGESA 1.2.0.7?

3600C14 should be faster anyways.

I've stopped chasing the Dragon anyways and am now chasing capacity lol

2x32GB for me from now on (helps with the DC work I do)
 
its the 4 sticks vs the imc. lower speeds and timings. or leave it at 3600 and sort that out(tweak it).
 
bluestang said:
You have the latest BIOS with AGESA 1.2.0.7?

3600C14 should be faster anyways.

I've stopped chasing the Dragon anyways and am now chasing capacity lol

2x32GB for me from now on (helps with the DC work I do)
Click to expand...

Yup on bios 4901 with AGESA 1.2.0.7

Im pretty sure 3600 CL14 is probably faster anyways but always fun to chase a number.

pendragon1 said:
its the 4 sticks vs the imc. lower speeds and timings. or leave it at 3600 and sort that out(tweak it).
Click to expand...

That's what I was leaning towards. The memory voltage frequency scaling I was getting should allow me to do 3800 at 1.5V or even faster going by what other kits I see on the market.
 
Priller said:
Single sided dims. I don't let ram temps exceed 50C. Everything else seems normal. I pulled the timings and voltages directly from Ryzen Dram Calculator. I even tried a mix of looser timings meant for 3800 at 3733 and it continually spits out WHEA errors.

I have updated the bios, as I was 1 behind, and so far 3533 CL14 @ 1.4V, SOC 1.1V, seems stable. Trying the slow approach now to see if I can find the 1 subtiming or voltage it didnt like before.
Click to expand...
try a high trfc i have dual rank and micron e-die but my xmp timing for trfc seems really high compared to timings i've seen other people run but i tried lowering it to what i've seen others do and it just won't do it. i have it set a little lower than what's recommended (if i remember correctly) but i guess it just is what it is. but currently i have my 2x16 3200 sticks running at 3666 and my trfc is set to 560 i think xmp was 350 or something? (been a long time since i've messed with it)
 
d3athf1sh said:
try a high trfc i have dual rank and micron e-die but my xmp timing for trfc seems really high compared to timings i've seen other people run but i tried lowering it to what i've seen others do and it just won't do it. i have it set a little lower than what's recommended (if i remember correctly) but i guess it just is what it is. but currently i have my 2x16 3200 sticks running at 3666 and my trfc is set to 560 i think xmp was 350 or something? (been a long time since i've messed with it)
Click to expand...

At one point i have timings set to 22 and trfc set in the 600s with fairly high voltages. 8GB B die even at that speed shouldnt really need trfc that high. Atleast in my experience.
 
Just to finish this particular experiment off. I went back and tried only 2 stick to see how far they would go. Whoever guessed the IMC or Mobo being the bottleneck would be correct.

With 2 sticks getting to 3733 CL15 wasnt much of an issue. No matter the voltages applied, several of which are not 24/7 safe, it refused to go any higher.
I tested with 3 different Flare X kits just to see if I had any that would scale a bit better but no matter what they all behaved the same and 3800 on my particular combo doesnt seem possible.
 
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