Struggling to overclock my RAM. What am I missing?

Firegod

Firegod

Firegod

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Hey all

So I have Kingston HyperX 3200Mhz DDR4 RAM 32GB (2x16GB). A user on another forum here has the same memory (but 16GB capacity). The kit uses Hynix J-die memory. I don't know much about this, but, following the post (#28) in the above link the other person has had good results.

They say "Currently running at 3733Mhz 16-19-18-36 1T in 1:1 mode with IF at 1867 on X570 Aorus Master."

I can't even get my machine to boot (it will POST) on 3400Mhz.

I plumbed all the figures into the Ryzen Calculator, and used Thaiphoon Burner to make sure I had the same memory / chips.

So current settings are:

CAS# Latency: 16
Trcdrd: 18
Trcdwr: 18
RAS# Pre Time: 18
RAS# Act Time: 36
Trc: 74
DRAM Voltage: 1.35v

These are the exact values that Kingston recommend when running at 3200Mhz.

Some extra settings to note:

Power Down: Auto
Gear Down: Disabled
CMD 2T: Disabled (1T)

My CPU is fixed to 41.0 x 100 at 1.38125v (1.38v).

The only difference I can think is i'm on a Ryzen 5 2600X and a 470-F motherboard (i.e. Older CPU and Mobo compared to the above user). I wonder if that is the reason.

I've tried these settings at 3400Mhz (Safe settings from Ryzen Calculator) and get no joy:

CAS# Latency: 17
Trcdrd: 19
Trcdwr: 19
RAS# Pre Time: 20
RAS# Act Time: 40
Trc: 74
DRAM Voltage: 1.41v
Power Down: Enabled
Gear Down: Enabled
CMD 2T: Enabled (2T)

Won't have it. Am I missing some magical setting? Is it my CPU voltage? Have I fixed something that I'm meant to uncouple. Is it this IF that is causing me the problem? Such a shame I was hoping for, well, not even similar, I'd have been keen to just get 3600Mhz.

Thanks for any help!
 
Joxeon said:
This would be the reason your having trouble clocking the ram higher as the memory controller on the older ryzen CPUs isn't as good as the current 3000 series and anything over 3200 is a bonus as some struggle to even hit that speed.
Click to expand...

Ahh then that is fair enough. :) I thought I was being daft, I couldn't see where it was going wrong. Roll on the next Ryzen release and I'll do an upgrade and then I might have more luck. Seems like the RAM is capable. Cheers!
 
Progress! :)

So I thought I'd take another whack at this today. I set all the advanced memory settings that the DRAM Calculator suggests, back to Auto. Plumbed in the basic memory settings, CAS - TRCD - TRP - TRAS. Manually tweaked the VDDP voltages from 0.900v to 0.950v. Left everything else. Memory still at 1.35v. And so far so good, I'm in Windows and running DDR4-3400Mhz at 16-18-18-36 1T. :)





So my Memory Mark score has gone from 3112 to 3174 (pictured) and moved from 79th percentile into 83rd percentile (pictured). Nice little bump.

I'll leave it like this for a while and make sure things are OK.
 
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Small update tonight. Managed to boot in at slightly quicker 3466Mhz. Had to alter timings from 16-18-18-36 to 18-19-19-39. Still 1T. Small Memory voltage bump from 1.35v to 1.38v and ProcODT resistance increased from 60 ohms to 68.3 ohms. Going to see if I can get any quicker and then circle round and then tighten up the timings if possible.
 
Weird. Set CAS to 17 in BIOS and dropped some of the other timings back. Should be 17-18-18-39 1T yet CPU-Z is reporting the CAS as 18 still. Double checked it as well. That's strange...

CPUZ-3466-Mhz.jpg


EDIT: Sorted, Gear Down Mode was on for stability but I hadn't realised that causes only even CAS values. Now disabled along with Power Down Mode.

DDR4-3466Mhz @17-18-18-39 1T

Pretty pleased with that.
 
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What do people use to test their RAM? I've downloaded BurnIn and ran that for a quick 15 minutes on the RAM. Do people still use Prime95?

Cheers.
 
Just digging up this old thread. I knew the Kingston RAM had more to give and since moving to the 5800x, I've managed to get the kit working at 3600Mhz. So figures are now:

DDR4-3600Mhz @18-19-19-58 1T with 1.39v.

I think being able to separate the Infinity Fabric stuff over the the 2000 series CPUs has helped.

Disabled spread-spectrum and Rttnom to help. Didn't touch the SoC or VDDP voltages yet, just left on auto. And hopefully now the 5800x will appreciate the extra bandwidth. Samsung B-Die who... :p Hynix J-Die seem just as fine. :)
 
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