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  Topic Review (Newest First)
01-25-2020 03:04 PM
keikei
Quote: Originally Posted by thomasck View Post
No issues at all, I'm very happy indeed, I came from a 1800X and it's like from water to wine

Stable, reliable and fast - ok, the 1800X was fast, but the 3900X it's another level of fastness.

I appreciate the response.
01-25-2020 02:40 PM
thomasck
Quote: Originally Posted by keikei View Post
Any issues with the chip on the X370? I'm looking @ an upgrade to it myself later this year.
No issues at all, I'm very happy indeed, I came from a 1800X and it's like from water to wine

Stable, reliable and fast - ok, the 1800X was fast, but the 3900X it's another level of fastness.
01-25-2020 01:50 PM
keikei
Quote: Originally Posted by thomasck View Post
IF am4 will support 4000 series, I'll do my best to do no upgrade from the 3900x.

Any issues with the chip on the X370? I'm looking @ an upgrade to it myself later this year.
01-25-2020 01:07 PM
Unoid I fixed my memory overclock finally with 1004B beta. I reinstalled ryzen dram calc without importing taiphoon burner settings. I got PC3400 working again with my b-die. 3600 no go.
01-25-2020 11:18 AM
garych @thomasck yep, after reading stuff about EDC 1 and how dangerous it behaves, I've decided to be safe (even though I wasn't even gonna try out EDC 1) and disable PBO with AutoOC altogether, and just set the offset to -0.0875 with LLC3, fans set to max quiet speed up until 69C, and 100% @69C+.
Just to be safe and not sorry after a year or two.
Prime95 with Small FFTs reaches just 75-76C at 20C room temperature with all cores at the same Effective Clock of 3925-26MHz, except the worst Core is 4-6MHz slower.
Core jumps in the range of 1.256-1.275 V during that according to SVI2, and 1.252-1.271 according to VRM.
01-24-2020 05:16 PM
thomasck For the 3900x owners, what is you vcore under cb15/20 load and your scores? And clock, if not auto.

Little edit regarding the EDC 1 trend.

Well, I've tested and from my point of view is not worthy and seems TO ME that is just a numerical thing, clocks are higher, yes, temps are way higher (cause of higher vcore) but results do not correspond to it in benchmark numbers in cb15, 20, cpuz and superpi.

What EDC 1 did here was allowing cb20 to maintain 4375mhz even after 70C (which usually gets down clocked to around 4125 when it breaches the 70C) when on auto clock. So or you have a best of cooling or you adjust llc/offset to do not get around 70C under load whereas your cpu will not down clock.

In my case ECD 1 even with LLC5 and negative offset of 0.5 (can't go lower without crashing) was giving me about 1.325V under load, 75C CB20 and even hotter in CB15. Scores? No worth it, CB20 around 7420 and cb15 did not take advantage of it remaining in around 3250. But the clocks were better, 150mhz+ more than when just on auto.

And then I've seen another offset option around CBS, which allowed me to reduce vcore even less while using llc4 and negative offset of 0.1, so I set that to 100mV, and I'm getting 1.248V under load. Clocks? Numerically lower, temperature way lower, but look at the scores in the spoiler bellow. The same as when I was just using LLC 4 with negative offset of 0.1, which was my daily config since bios 5.93.


Spoiler!


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01-24-2020 06:55 AM
Veii
Quote: Originally Posted by RobJoy View Post
I undervolt with -0.050 offset, and limit max frequency.

Nothing can go wrong.
Yes, if you know your max voltage
As FIT will be disabled by that bug, and PBO does increase allcore & max supplied voltage
01-24-2020 05:51 AM
RobJoy
Quote: Originally Posted by Veii View Post
I hope when you guys try this dangerous method - which Polkfan discovered about 3 months ago
That you note your max allcore voltage from FIT beforehand
As PBO will increase supplied max voltage, and will increase min allcore
Just keep in mind, that overshooting this allcore voltage will degrade your ryzen
Notes to read about finding the save allcore voltage for your sillicon:
https://www.reddit.com/r/Amd/comment...afe_for_zen_2/

Before you try abusing a boosting bug which disables FIT and so the safety, just be sure not to overshoot your allcore voltage under AVX2 harsh tests
Same for per CCX OC ~ know beforehand your save for your sillicon voltage
1.48(5)v is usually the max boosting voltage, max allcore voltage varies between 1.28v-1.3ish / with rare samples who are rated for 1.325 as absolute max
I undervolt with -0.050 offset, and limit max frequency.

Nothing can go wrong.
01-24-2020 04:59 AM
Veii I hope when you guys try this dangerous method - which Polkfan discovered about 3 months ago
That you note your max allcore voltage from FIT beforehand
As PBO will increase supplied max voltage, and will increase min allcore
Just keep in mind, that overshooting this allcore voltage will degrade your ryzen
Notes to read about finding the save allcore voltage for your sillicon:
https://www.reddit.com/r/Amd/comment...afe_for_zen_2/

Before you try abusing a boosting bug which disables FIT and so the safety, just be sure not to overshoot your allcore voltage under AVX2 harsh tests
Same for per CCX OC ~ know beforehand your save for your sillicon voltage
1.48(5)v is usually the max boosting voltage, max allcore voltage varies between 1.28v-1.3ish / with rare samples who are rated for 1.325 as absolute max
01-24-2020 04:30 AM
thomasck I've tried the edc 1 setting, clocks are higher like 25-50mhz more but the numbers in benchmarks are pretty much the same, cb15 s214+-/m3245+- cb20 s512+-/m7370+- cpuz s550+- m8400+-.

That reminds me when I was testing a variety of vcores either fixed or auto with LLC and offset, I was getting strangely 25-50mhz higher clocks, constant higher single cores boosts, but benchmarks and games were, the same.

What really gave me a real bump in performance was ccx overclock with the 3900x.

Sent from Tapatalk
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