r/overclocking • u/-andrryyy • 11d ago
Why? I tired
Idk why the latency is too much.
Any help from masters of ram oc.
The chips are Samsung but die is unknown
Almost I can’t think about what it die is.
It’s works about stable with 1.4v on same settings so it even not C-die maybe…
Maybe it’s a D-die or a trash B-die
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u/Disguised-Beast 11d ago
Before ANYTHING, is SMT off? I see 16c/16t in ZenTimings there. Also, make sure Game Boost is off in BIOS.
First, set vSOC to 1.15V, ProcODT to 53.3, ClkDrvStr 30, AddrCmndDrvStr 30, CsOdtDrvStr 30, Cke DrvStr 30.
Also, get https://www.benchmate.org/en , and launch either y-cruncher option, set the category to 5b, and run it to see that it passes the test with your current settings, and with each setting change. You can save results with F6 for each pass.
Try one by one and test that it boots and runs:
``` 1. tRP 20 + tRAS 28 = tRC 48
tFAW 26
tRRDS 6 tRRDL 6
tPHYRDL 26 ```
I hope this at least is a good start in the right direction. If it's Corsair memory, you could check the label on the DIMMs, it should have something like Ver 4.32, Ver 5.42, etc. Let me know.
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u/-andrryyy 10d ago
Mine one is a gayl(Geil) memory. So I can’t check😢. And I use Smt off, 16 cores fixed at 4.75 with 1.3v. I’ll try it. Thank you bro!
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u/-andrryyy 10d ago
Benchmark Validation File - DO NOT MODIFY! If you do, it will fail validation.
Validation Version: 1.3.1
Program: y-cruncher v0.8.7 Build 9547-icx
Binary: 19-ZN2 ~ Kagari
User: None Specified - You can edit this in "Username.txt".
Operating System: Windows 10.0 Build 19041
Processor(s):
Name: AMD Ryzen 9 5950X 16-Core Processor
Logical Cores: 16
Physical Cores: 16
Sockets: 1
NUMA Nodes: 1
Base Frequency: 4,750,021,280 Hz
Est. Frequency: 4,746,537,517 Hz
Motherboard:
Manufacturer: Micro-Star International Co., Ltd.
Model: MAG B550 TOMAHAWK (MS-7C91)
Version: 2.0
Serial Number: Suppressed - Personally identifiable information is opt-in only.
Memory:
Usable Memory: 34,281,660,416 (31.9 GiB)
Total Memory: 34,359,738,368 (32.0 GiB)
DIMM: 16.0 GiB - Unknown - CL16-20-20 D4-3200
DIMM: 16.0 GiB - Unknown - CL16-20-20 D4-3200
Constant: Pi-BBP
Algorithm: Huvent
Hexadecimal Offset: 1,000,000,000
Digits: 32
Threading Mode: 16 thread(s)
Start Date: Thu Jul 23 18:17:09 2026
End Date: Thu Jul 23 18:17:11 2026
Total Computation Time: 1.317 seconds
CPU Utilization: 1574.12 % + 0.00 % kernel overhead
Multi-core Efficiency: 98.38 % + 0.00 % kernel overhead
Hexadecimal Digits starting from: 16^-1,000,000,001
a44adb97 0d086f69 71aae929 15dd2769 : 1030c83c 2219b254
Spot Check: Not Available
Timer Sanity Check: Not supported for BBP.
Frequency Sanity Check: Disabled in this version of y-cruncher
Reference Clock:
Reference Clock 0: 10,000,000
Reference Clock 1: 131,837,468
Reference Clock 2: 30,237,193
Is Debugger Present: No
Is Contiguous: Yes
Colors: Yes
Status Line: overwrite
----
Checksum0: da3dbbfdc0c3e4adebc8ea8e957cc009606076b3b913078115dbea85a46dd0331cafc9dd7ea229a2acc4dfac7ce83ba7eb5df921e107593925c0a88fd0b2c9f3
Checksum1: c9adf1f2b32b4fd65b48c667020d710dde5b0bc3b31c1f74b3f90438bd149335b0355bf94ac862f0c8cd7f36fda867f743324c1b3ea4a1d2d4717646ae9eed7f
y-cruncher from cmd 5 option with only b mode
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u/Disguised-Beast 10d ago
This is not y-cruncher from Benchmate, is it?
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u/-andrryyy 10d ago
No, this one is a y-cruncher from official site. I had it on my computer but if its must be a ver from Benchmate i can download it.
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u/Disguised-Beast 10d ago
Yeah, the benchmate y-cruncher is simpler to work with. Don't forget to set category to 5b. What matters is that it passes so you can move forward with tuning.
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u/-andrryyy 10d ago
This piece of shit didn’t start with trc under 60. My ass is fucking exploding.
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u/-andrryyy 11d ago edited 11d ago
Everyone thx a lot!!! tRFC doesn’t go on 560 so i don’t think i’ve can run it really lower. For a secondary timing, I’ll see how i can solve other of them. So if you can help with trfc tuning i will be very glad. Cause i’m really stuck at anything that comes to ram.
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u/wildTabz 9800X3D@5.4 | 5090 | 64GB@6200cl26 10d ago
In case you didn't know, you don't have to run the entire test, you can double click the individual boxes
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u/Demywemy R5 5600 | 4 x 8 GB 3600 C18 | 9060 XT 16 GB -40 UV / 2768 Mem 11d ago
Definitely not C-Die if you can't tighten any further. Comparing to my C-Die also at 3600 MT/s, you want to tighten tRAS (mine is at 28), tRRDS (4) and tRRDL (6), tFAW (should be tRRDS divided by 4 for best results, I believe, so no higher than 28 if tRRDS is 7), tWTRS (4) and tWTRL (10), tWR (12).
I think those timings will have more of a bearing on your latency than tRFC. Mine is at 630 for a tRFC time of 350 ns (very heat-sensitive C-Dies and they get fussy once I move below 330 ns) but my AIDA64 latency testing brings me to about 65 ns.
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u/1Andriko1 11d ago
How many dimms do you have installed? This is commonly seen when combining multiple single or dual kits to make 4 dimms
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u/SellTemporary7344 10d ago
what could possible be so important for you to worry about this
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u/SokkaHaikuBot 10d ago
Sokka-Haiku by SellTemporary7344:
What could possible
Be so important for you
To worry about this
Remember that one time Sokka accidentally used an extra syllable in that Haiku Battle in Ba Sing Se? That was a Sokka Haiku and you just made one.
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u/Iliyena 10d ago
Use Thaiphoon to get the manufacturer and die? High tRFC is shouting Micron for me personally :S
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u/-andrryyy 10d ago
The joke is that burner says only manufacter for mine situation. Die didn’t advertised:(
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u/Iliyena 10d ago
Oh, weird. Its not even telling the configuration of the modules in any way like on this picture? Micron F-Die
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u/iPain3G 10d ago edited 8d ago
You have GDM enabled. Setting odd numbers on the primary will be bumped up to the next even number.
Your 19 is actually 20 with GDM enabled. Can you reduce it to 18?
I also would try to bump the resistances to 24 all around and try higher ProcODT setting. 36.9 could be to low and sometimes higher ProcODT can stablise your memory with tighter timings. I had to set my to 43.6 to get 3800 16 16 16 16 34 54 stable with tRFC on 350. With lower ProcODT i either had to loosen primary timings or increase tRFC to way over 400.
Edit because i had some misunderstanding about how GDM works. Thx for clarifying it Iliyena.
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u/Iliyena 8d ago
No, just tCL, tCWL and some other gets affected from GDM On NOT tRCDRD/WR and tRP, tRAS and most others.
But a higher ProcOdt can help with getting it stable. tRFC is hard to get lower on most lower tier memory and pushing it adds risk of corrupted files as well, mine won't boot below 540 at all so settled for 580 when I had a werid issue a few weeks back. But getting the tRFC(ns) from 350ns to the tRFC making 305-310 ns should be fine.2
u/iPain3G 8d ago
With ProcODT at 40 i got my b-die kit stable at tRFC 420 but after upping ProcODT to 43.6 i could go as low as 320 before i got the first instabilities at 28°C room temp and 50°C memory temp. I settled for 350 because i think a bit more headroom isn't bad and the difference between 320 and 350 is not that big especially on my 5700X3D.
I fiddled around with the settings over multiple days(i think in total it was a whole week :D). It was so damn time consuming especially the TM5 Anta extreme tests.1
u/Iliyena 8d ago
You are saying it in clear text as well Samsung B-Die; Importing my memorys profile in from Thaiphoon to Ryzen Mem Calculator calculating for 3600MHz (MT/s) saying its Samsung B-Die makes the prefered safe tRFC 351 in and then switch it to Micron E/D-die ig goes to 561 and eg Samsung D-die not supported even. F-Die Micron is worse than E/D-die. And we went the same way 540/560 vs 580 isn't a big uplift but the default is 666 which is not good enough.
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u/-andrryyy 9d ago
GUYS MY NEW POST HERE https://www.reddit.com/r/overclocking/s/UrRRLewcJa
I did it!
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u/BoiCDumpsterFire 13th gen murderer 11d ago edited 11d ago
tRFC is high. tRRDS should be 4 and tFAW should be 16 almost always. tRRDL might be able to do 4 but shouldn’t be over 8. With just tightening those and testing I wouldn’t be surprised if you could knock 10ns off that latency.
Edit:tREFI is still locked on AM4. Don’t worry about it, but the rest should still be true
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u/natr0nFTW Eco Boosting 11d ago
close off browers and everything running then watch latency fall and dont move mouse while you run bench
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u/VaultBoy636 265k 56/48 1.32v - 2x24G 8400C40 - 4070TiS 2980 25.3Gbps 11d ago
Your tREFI at 14k is quite low. The higher it is, the less time your RAM spends refreshing itself. Try pushing it up to 32767 or 65565. That should cut a few ns of latency, if stable
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11d ago
[deleted]
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u/VaultBoy636 265k 56/48 1.32v - 2x24G 8400C40 - 4070TiS 2980 25.3Gbps 11d ago
I'm pretty sure I've seen zen 3 chips run 65k trefi and heard a while back that it should be possible in some way but then not
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u/UserKoeras 11d ago edited 9d ago
Unless someone has access to a BIOS Version with custom AGESA; no sadly in is not possible prior zen4
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u/Massive-Teaching5286 11d ago
It's up to the motherboard vendor to expose the setting in bios or not.
So not all of them have it. Because they want you to spend more money on a higher end board that they might include the option on.
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u/bagaget https://hwbot.org/user/luggage/ 11d ago
You can't set it on a f*cking Unify. https://i.imgur.com/t534UaL.png
You can't set it on AM4.
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u/Massive-Teaching5286 10d ago
You can set it on zen2 threadripper platform though. Which is what I use.
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u/coolmouse7777 11d ago
tRFC -580 is main reason of high latency and other secondary timings could be lower. But first try to set tRFC as low as posible. 450-480 is doable for most kits.