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AMD RYZEN Builders Thread

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Pohemi420

Diamond Member
Oct 2, 2004
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I don't really see it go over 60C under full load, I'm using a Corsair H115i Pro to cool it.
 
Feb 4, 2009
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Anyone seen their Ryzen boosting above and beyond the expected maximum boost speed, when OC settings are untouched besides XMP2.0 ? My 2700X has some of the cores boosting to a max of 4650MHz on an MSI X470 Gaming Pro Carbon with 32GB DDR4-3200 CL14.

I've seen these same speed readings in HWMonitor and CPU-Z, as well as Ryzen Master when I still had it installed. To be clear, I've never seen any core STAY at that clock speed for more than a split second. Just wondering if it's normal or not.
What memory are you using?
 

Jism

Member
Feb 12, 2019
27
1
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Someone tipped me, to exchange the memory from slot 1 and 3 to 2 and 4, after a bunch of issues getting a hynix kit rated at 3200Mhz at it's intended speed. After swapping out sticks i can confirm that the set now works using XMP without hassle.

This goes out for a Asus 470-F strix and a kit of 2x 16GB 3200Mhz Hynix CL16 memory.
 

Markfw

CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
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Someone tipped me, to exchange the memory from slot 1 and 3 to 2 and 4, after a bunch of issues getting a hynix kit rated at 3200Mhz at it's intended speed. After swapping out sticks i can confirm that the set now works using XMP without hassle.

This goes out for a Asus 470-F strix and a kit of 2x 16GB 3200Mhz Hynix CL16 memory.
The manual says for 2 sticks, that is where they are supposed to go,.
 
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Jism

Member
Feb 12, 2019
27
1
16
I have'nt read any manual, lol. I just went into a local PC store > said this is my budget, i want a ryzen based system, and they did the rest. They have'nt readed the manual then. The sticks refused to boot to anything higher then 2933Mhz. Now that i swapped 'm out for slot 1 & 3 to slot 2 and 4 it's working out of the box with XMP @ 1.35v.

Not much of a difference really when i had it on Cl14 / 2933Mhz vs 3200Mhz CL16. I am going to spend some time in the future to memory overclocking but since i am using primocache with 8GB of assigned 'cache' i cant permit any memory errors going on.
 

Asterox

Senior member
May 15, 2012
525
764
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Well if 100$ for R5 1600 was is kind of ridiculous, what could we say for only 80$ price.

https://www.microcenter.com/product/478826/amd-ryzen-5-1600-32ghz-6-core-am4-boxed-processor-with-wraith-spire-cooler

Compared to Intel(we have to feed nearly 100,000 workers and 12 FAB-s), AMD obviously has a lot of room for profit.Retailers can not sell Ryzen CPU below certain price point, or in situation where AMD selling processors would not make any money.

In short this is easy hunting for undecided users to enter the AMD ecosystem.
 
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Jism

Member
Feb 12, 2019
27
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What are people's, average undervolts on a Ryzen 2700x? So far i put on both SOC & CPU Cores 0.0875 offset voltage ( - ) and it keeps the SOC at exactly 1v / 3400Mhz Memory speed, the CPU voltage is idle at 0.750v (before 0.850v) and on light workloads ~ 1.45 / heavy loads 1.325v. However, the XFR seems to hold now much longer on 4.14Ghz all cores when running CB, this was like 4.04Ghz before. On IBT / High it holds on exact 4Ghz all cores and before this dropped back to 3.9Ghz or so.

The performance for CB obviously increased, since XFR is kicking in longer. I might play around with voltages a bit more, i think it's a mix of power consumption and thermal threshold for XFR to work it's magic. With IBT high it's sitting at 66 degrees and CB around 65 degrees. Before the UV party this was around 68 degrees.

Undervolting the SOC does nearly nothing with the temps. This is where i started first. Perhaps 0.3 degrees from going stock 1.15v to 1.0v. Peak chip wattage went from 162W back to 141W on CB.
 
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thigobr

Member
Sep 4, 2016
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At high frequencies Ryzen needs too much vcore... I don't think it's a good trade off unless you're after the absolute ultimate performance at all costs. I would say 4000/4100MHz is the sweet spot for both Zen and Zen+ where you use vcores around 1.350V.
 

Jism

Member
Feb 12, 2019
27
1
16
1.33v so far at CB. It seems to hold boost from the beginning up to 4190Mhz and drops to 4140mhz after the temp rises above 62 degrees. IBT is different; this drop the clocks to 4090Mhz and keeps it there. Normally it was 3.9Ghz. I shaved off some watts in order for XFR to remain the boost state longer. I'm going to attempt to shave voltages off even some more. AMD is lit.
 

DrMrLordX

Lifer
Apr 27, 2000
17,248
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At high frequencies Ryzen needs too much vcore... I don't think it's a good trade off unless you're after the absolute ultimate performance at all costs. I would say 4000/4100MHz is the sweet spot for both Zen and Zen+ where you use vcores around 1.350V.
You are lucky to get Zen running at 4 GHz with only 1.35v vcore. Pinnacle Ridge is better-behaved in that clockspeed range.
 

thigobr

Member
Sep 4, 2016
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You would be very luck indeed to get one the first batches to run near 4GHz and 1.30~1.350V. My first chip only did 3.8GHz at 1.300V. But after a few weeks of usage I found the segfault bug under Linux when compiling work projects. I did the RMA and my new chip, which I am still using, is running at 4GHz/1.300V lowest LLC since then (after couple weeks of testing at stock settings to make sure the chip was good - i.e. no segfault bug).
 

Jism

Member
Feb 12, 2019
27
1
16
I found out that upping the VRM switching frequency, requires a lower overall CPU voltage to 'pass'. I.e less temps.

Is putting a higher frequency of the VRM causing anything related to longevity of the VRM? It's cooled; that's not the issue.
 

Mr Evil

Senior member
Jul 24, 2015
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mrevil.asvachin.com
I found out that upping the VRM switching frequency, requires a lower overall CPU voltage to 'pass'. I.e less temps.

Is putting a higher frequency of the VRM causing anything related to longevity of the VRM? It's cooled; that's not the issue.
Increased switching frequency causes:
  • Less voltage ripple (good).
  • Lower efficiency, i.e. more heat.
If it's kept cool enough, then it will be fine.
 

Jism

Member
Feb 12, 2019
27
1
16
If i buy a premium board, i expect ofcourse to use all it's features that are build into. I see so many people buying the most expensive boards out that and have zero knowledge of what function actually does what. The auto feature appeareantly keeps it at the stock switching frequency where everything is played safe. Bullzoid once tested with a oscilloscope what the effect of auto, 300, 500, 600 and so on was in Switching Frequency. The oscilloscope presented the higher you went the more 'stable' that voltage curve was.

So yeah i'll stick to 500khz from this point on, the VRM's do not get that warm at all (55 degrees) and if it helps my undervolting with even better values then it's OK.
 

DrMrLordX

Lifer
Apr 27, 2000
17,248
6,250
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I still have my launch 1800x. I'm either going to give it to a family member, or leave it in the board and frame it. Probably the former.
 
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Jism

Member
Feb 12, 2019
27
1
16
Newer x570 boards seem to have 4000MHz support (OC mode) for Ryzen 3x series. Any idea why you need a newer board in general to have support for 4000Mhz ram besides the CPU having the IMC integrated into it? Does it have todo with paths / signalling levels and all that?
 

B-Riz

Golden Member
Feb 15, 2011
1,461
562
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Newer x570 boards seem to have 4000MHz support (OC mode) for Ryzen 3x series. Any idea why you need a newer board in general to have support for 4000Mhz ram besides the CPU having the IMC integrated into it? Does it have todo with paths / signalling levels and all that?
Yes, more robust design. B450 and X470 boards had some tweaking done to be a bit better with memory compatibility vs. B350 and X370.
 

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