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Thread: NEW!!! DRAM Calculator for Ryzen™ 1.7.3 (overclocking DRAM on AM4) + MEMbench 0.8 (DRAM bench) Reply to Thread
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  Topic Review (Newest First)
07-07-2020 01:44 PM
2600ryzen
Quote: Originally Posted by Ronski View Post
Can't remember now what it was but certainly was around 50+, I'm using an AIO so no fan on the cpu, but there is a radiator fan directly above the memory.

I've updated my timings to match yours, and got 1 error in 20 cycles of TM5, and since running at 3800/1900 I've been having the odd restart issues, whether it be from windows or the BIOS, if I power off it boots no problem, and prior to tightening the timings it was stable, other than that it's looking good.

Anyone any pointers on what to tweak reference not rebooting please, but boots fine from power off?

I haven't had any booting/restart problems at 3800mhz, my cad bus is 24-20-24-24 maybe that's it? The extra write bandwidth looks like it really helps in the Dram calc benchmark that's almost 6 secs faster than my time with the same settings.
Not sure what caused the single error test 3 is mirror-move, I'm running VSOC 1.075v VDDG 0.95v and VDDP 0.9v. Or maybe the error is TRP too tight? I think that can be fixed by raising RAM voltage(I'm using 1.4v) or raising TRP to 16.


Edit: It's also possible TRDWR is too low and needs to be 11, that can cause posting issues.
07-07-2020 01:28 PM
LuckyBahstard (deleted - double post occurred)
07-07-2020 01:28 PM
LuckyBahstard
Quote: Originally Posted by mongoled View Post
Unsure about those results you seen in the "Google Docs".
...
I'd say you are right on the money with 1.48v!
...
Thanks for the vote of confidence. The google sheets I looked at were passed here on the forum and at least a few regulars here have entries in them.

I need to dive into understanding per-CCX OCs and adjusting thermal settings as @Veii was explaining with TDC a few pages back, since it appears I won't be using PBO anymore.

And yeah, regarding the Vipers, they are in the other PC, I need to pull them into this new one to see if I can do better with the 3900x and rog strix x570-E than the 3600 and cheap mobo.
07-07-2020 12:28 PM
mongoled
Quote: Originally Posted by LuckyBahstard View Post
Hey memory-OC fam... correct me if I'm making an error in sharing this here, but you all are the most likely to benefit from this ... If you're in the states, then newegg (I hate them with a passion) has GSkill Bdie for $99 for 16GB (2x8) and $200 for 32GB (2x16). Models F4-3200C14D-16GVK and 3200C14D-32GVK. That's less expensive than I normally see (around $235 on sale, $250 otherwise), and may only last a few hours.

Also, does anyone have thoughts on my previous concerns as to why I'm having to push my B-die at 3733 to 1.48V when others with the same kit seemingly report 1.40V in a couple of google docs? I'm not shocked at 1.48V for b-die, I'm used to seeing that. It's that others show lower voltage with my G.Skill kit or close variants of it.

I have tried all timings tighter but no luck. My Dram Calc results of ~108s are far off the suggested "best time" of 104.5s. Should I loosen tRP, tRC, and tRFC so I can possibly lower voltage (and heat)? Though my temps aren't bad, around 48 C at max during TM5.
Unsure about those results you seen in the "Google Docs".

Generally from what ive seen for "regular" ambient temperatures and for frequency in access of 3600 mhz with CAS latency of 14 you need more than 1.45v to have any real stability while stressing the memory with the correct tools.

I'd say you are right on the money with 1.48v!

Regards the best times, from my own experience with GSkill and Vipers the Vipers were faster with the same timings, so that may also play a role on the final result ....
07-07-2020 12:18 PM
Ronski
Quote: Originally Posted by 2600ryzen View Post
Mine has temperature sensors on the dimms, any errors I get from going over 50c can be fixed by adding 0.01-0.02v. Yours would definitely be going over 50c without a fan, possibly over 60c depending on ambient temp and case configuration.
Can't remember now what it was but certainly was around 50+, I'm using an AIO so no fan on the cpu, but there is a radiator fan directly above the memory.

I've updated my timings to match yours, and got 1 error in 20 cycles of TM5, and since running at 3800/1900 I've been having the odd restart issues, whether it be from windows or the BIOS, if I power off it boots no problem, and prior to tightening the timings it was stable, other than that it's looking good.

Anyone any pointers on what to tweak reference not rebooting please, but boots fine from power off?
07-07-2020 10:55 AM
LuckyBahstard Hey memory-OC fam... correct me if I'm making an error in sharing this here, but you all are the most likely to benefit from this ... If you're in the states, then newegg (I hate them with a passion) has GSkill Bdie for $99 for 16GB (2x8) and $200 for 32GB (2x16). Models F4-3200C14D-16GVK and 3200C14D-32GVK. That's less expensive than I normally see (around $235 on sale, $250 otherwise), and may only last a few hours.

Also, does anyone have thoughts on my previous concerns as to why I'm having to push my B-die at 3733 to 1.48V when others with the same kit seemingly report 1.40V in a couple of google docs? I'm not shocked at 1.48V for b-die, I'm used to seeing that. It's that others show lower voltage with my G.Skill kit or close variants of it.

I have tried all timings tighter but no luck. My Dram Calc results of ~108s are far off the suggested "best time" of 104.5s. Should I loosen tRP, tRC, and tRFC so I can possibly lower voltage (and heat)? Though my temps aren't bad, around 48 C at max during TM5.
07-07-2020 09:27 AM
Zektbach
Quote: Originally Posted by SpecChum View Post
Wrong bit buddy, that'll be the same on any (that's basically the tech sheet from Samsung before they're binned by G-Skill or Corsair, or whoever), you need the XMP PARAMETER part, but that'll say 350ns too.
Sorry my bad. Here.




****UPDATE

I have tried trfc 560 - 416 - 256 = my 76ns went down to 73ns! Is that good enough of should i push more?

****Another update

Tried 480 - 357 - 219 and it didnt work. (not posting)
07-07-2020 09:25 AM
SpecChum
Quote: Originally Posted by Zektbach View Post
Here.

I'm afraid what trfc i should use cos resetting cmos battery is such a hassle lol.

Wrong bit buddy, that'll be the same on any (that's basically the tech sheet from Samsung before they're binned by G-Skill or Corsair, or whoever), you need the XMP PARAMETER part, but that'll say 350ns too.
07-07-2020 09:13 AM
Zektbach Here.

I'm afraid what trfc i should use cos resetting cmos battery is such a hassle lol.

07-07-2020 09:10 AM
SpecChum
Quote: Originally Posted by 2600ryzen View Post
A lot of the time [email protected] of Samsung C die is identified as b die by thaiphoon. What trfc in ns does thaiphoon report? If it's 350ns it's definitely c die.
b-die reports as 350ns in Thaiphoon too.

This is from my 3200C14 b-die kit:
Code:
Normal Refresh Recovery Delay Time (tRFC1 min):	350.000 ns
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