NEW!!! DRAM Calculator for Ryzen™ 1.7.3 (overclocking DRAM on AM4) + MEMbench 0.8 (DRAM bench) - Page 778 - Overclock.net - An Overclocking Community
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NEW!!! DRAM Calculator for Ryzen™ 1.7.3 (overclocking DRAM on AM4) + MEMbench 0.8 (DRAM bench)

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post #7771 of 7886 (permalink) Old 05-23-2020, 11:41 AM
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I've managed to snag that mythical 4x8GB 3800MHz CL14 G.Skill Neo B-Die kit. Should arrive in a week or two.
Don't even start me on the price, Jesus Christ Almighty...

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post #7772 of 7886 (permalink) Old 05-23-2020, 12:01 PM
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Quote: Originally Posted by Martin778 View Post
I've managed to snag that mythical 4x8GB 3800MHz CL14 G.Skill Neo B-Die kit. Should arrive in a week or two.
Don't even start me on the price, Jesus Christ Almighty...
Holly , I can smell how much it cost you.

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post #7773 of 7886 (permalink) Old 05-23-2020, 01:11 PM
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@Veii

It was either tWR or tCWL that kept me from booting. I made the other changes without issue(sorta).

It seems when I disable GDM it swaps over to a 2T command rate. I haven't done any performance testing yet. I also forgot to change tRAS to 32 from 30. How much of a difference would that make?

Also, with the [email protected] and [email protected], I didn't see much of a difference anywhere that I tested(just did a quick run of Aida64 and Performance Test 10 Memory only).

I haven't done the TM5 20 cycles yet. I did run Karhu w/CPU Cache enabled though(1T command rate). I ran it for 4hrs, got to over 8600%, using 28000mb of ram.

Click image for larger version

Name:	32 Karhu Veii.jpg
Views:	50
Size:	246.4 KB
ID:	348646

This is still with stock voltage and [email protected] No changes made in the Termination Block, or CAD_BUS Block. Also, I looked through my bios, not able to find anything for BGS settings at all. Gigabyte removed those from the bios for whatever reason. I guess because BGS Alt enabled by default on T-Topolgy was all this board needed maybe?

Anyway....back to the grindstone. lol

Again, thanks for all the help...to not only myself, but to the community as a whole.

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post #7774 of 7886 (permalink) Old 05-23-2020, 01:16 PM
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Quote: Originally Posted by Veii View Post
It makes sense
you can't run that low tRDWR, soo you need added latency
9/4 is fine too , else 10/1 would be what will work on your side
you have to test
likely 8/4 could work if you lower your timings
tWR is not needed to be that high
Rulesets for it are
tRRDS + tWTRS
tCL + tRTP
tRAS - tRCD
All 3 are correct
when tRTP is a clean divider of tRFC, then tWR can be double or tCL+tRTP

There are many options, there isn't one right one
It depends on the IC and remain set of timings what will fit
But low tRDWR either works or won't post if the remain timings are high, soo tRCD/2 is a good template for it
i get for tWR between 12-18, 24 idk if you need it thaat high
Can you try if this would even post ?


I wasn't trying to use that set of timings or improve them. I just quickly put them in the bios to attempt understanding tRDWR and tWRRD relation. Sorry for being confusing, thank you again for the knowledge bombs.

Last edited by Dollar; 05-23-2020 at 02:42 PM.
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post #7775 of 7886 (permalink) Old 05-23-2020, 02:14 PM
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Quote: Originally Posted by KedarWolf View Post
I found a 4000RPM RAM fan last night
I found a PWM to molex connector. The fan I have spare is not a good choice for ram cooling its a Silencia FP120 with really weak airflow. I have got this in my basket: Noctua NF-P12 redux-1700 PWM, 4-Pin, High Performance Cooling Fan with 1700RPM 120mm. I won't need anti-vibration mount brackets I'll just hang it from the PSU cord and brace elsewhere. I think that fan is going to be virtually silent compared to the rest of my fans @ 12v.

Also while rummaging around I used my multimeter and checked the resistance of a fan mod I made many years ago with 2 resistors in parallel. The resitance was 23.8 Ohms and they sell LNA (low noise adapters with 50+ Ohms giving ~8v, whereas my homemade one gives 10v according to online calculator (you have to plug in the fan power and current max rating to find its resistance and then use that to calculate a volt drop. http://www.ohmslawcalculator.com/ohms-law-calculator It helps I studied electronics, so with that calculator I could check if it was worth buying a NLA.

I also found a nice price for some of the 3000 RPM (NF-F12?) industrial fans. Might pick them up for my X72, they have 900 RPM ontop of what stock fans do (although I read the stock fans are not too shabby).

I don't have temp sensors on my Patriot Viper Steel 4400 but I did buy a small digital thermometer to keep an eye on ambient temps. The temps went up 8 degrees c and my 1.46v overclock wasn't stable (1.44v is just what I started (1.46 reported) which and never changed except when my OC became unstable. I'm totally stable with 1.4v DDR 3666 299 tRFC (tested in hotter weather), maybe it doesn't even need that much.

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post #7776 of 7886 (permalink) Old 05-23-2020, 02:17 PM
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Quote: Originally Posted by KedarWolf View Post
I found a 4000RPM RAM fan last night, I had broken the original one I had.

This at 15-16-8-13-27 2T with 1.45v RAM. RAM temps stay under 40C now when running TM5.

I can post all my BIOS settings including my ProcODT etc. if anyone wants.
Spoiler!

If you are stable @3800 1:1 with only ~1v SoC voltage maybe you have a golden sample CPU which can clock higher assuming the RAM isn't the limiting factor. I needed to up the SoC voltage for 3800 1:1 the minimum I have gameplay replay of is @ 1069mV up to 1088mV. At least in that range I found no problems.


Last edited by masteratarms; 05-23-2020 at 02:20 PM.
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post #7777 of 7886 (permalink) Old 05-23-2020, 02:49 PM
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Quote: Originally Posted by masteratarms View Post
[/spoiler]
If you are stable @3800 1:1 with only ~1v SoC voltage maybe you have a golden sample CPU which can clock higher assuming the RAM isn't the limiting factor. I needed to up the SoC voltage for 3800 1:1 the minimum I have gameplay replay of is @ 1069mV up to 1088mV. At least in that range I found no problems.
NB/SoC is at 1.114v with me.

It's the Chipset SoC that's at 1v.

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post #7778 of 7886 (permalink) Old 05-23-2020, 02:51 PM
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Says he's using 1.11v SOC?
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post #7779 of 7886 (permalink) Old 05-23-2020, 07:26 PM
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Quote: Originally Posted by dspx View Post
I hope you can see what you're looking for from my photo.

What are the differences between A1 and A2?
A2, like Veii said.

It doesn't show up well in my pic, but another thing is that on my 2666 sticks, I can see where there are pads for an ECC chip (since A1 is related to ECC D1), and also the SPD chip is visible on the same side as the chips. There are also no components on the back.

My 3200AES sticks have components on the back, besides the little bit tighter spacing of the ICs.

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post #7780 of 7886 (permalink) Old 05-23-2020, 09:29 PM
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Quote: Originally Posted by Veii View Post
I saw they where A2 pcb, soo you will for sure have issues with bad signal integrity and need higher drive impedance
(higher CAD_BUS ClkDrvStrengh ~ first value, near 40-60ohm, if not exceeding 100ohm up to IC)
What about A1 PCB on T-topology? Is there any link between CAD and usable VDIMM?

I spent some time this past week trying to work on 3533 with my 2666 Micron 8Gb Rev D sticks. They were getting fairly finicky here. I had been using 20-20-20-20 for 3200 and 3466, but went up to 24-24-24-24 here. It also seemed like I needed RTT Park to 60.

The issue I have had is that they seemed to prefer ~1.37V for best timings, but the subtimings did not want to tighten. This was sort of like when 1.410V could work for my primaries at 3466, but only with looser secondaries.

I actually pulled them since I had to test my new Rev E (A2 PCB) sticks for function, and I needed a break from them anyway.

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