[Overclocking] Recommended vcore for a ryzen 1800x

[Neoliox]

I would like to oc my 1800x to 3.8 Ghz (BC: 3.6 Ghz) but I don't know whats the ideal voltage. Yesterday I tried with 1.2v but I got a black screen so I clearded cmos. 1.2v seems to not be enough I guess but I read some tests that used 1.2v or even less to reach 3.8 Ghz. Or maybe I missed something else too

[Omega]

I wouldn't go any higher then 1.4v.

You will have to find the "ideal voltage" yourself. The lower the voltage the better.

[Neoliox]

I know I just want to save time. But I will test with 1.3v . I know I can go for 1.4 or semthing around this but like you said the lower the better but the pc needs to be stable too

[tacoshy]

Originally posted by Neoliox:

I know I just want to save time. But I will test with 1.3v . I know I can go for 1.4 or semthing around this but like you said the lower the better but the pc needs to be stable too

you ever heared the term silicon lottery? Well if you did you know that no CPU is the same. Every CPU needs different voltzages to get the same clock stable. So there is no easy or fast awnser then testing it yourself.

[InfinityJosh]

1.45v if properly cooled.

[igloosfolly]

Try 1.3875 the more you increase voltage the faster you hit the thermal wall. If stable keep going down. Sounds strange eeh. Ryzen is not a FX or Intel and does not OC quite the same way. At 1.4 probably will not be stable. Every chip is differant good luck.

[tacoshy]

higher volatge will icnrease stability not decrease it... if 1.3875V will be stable then 1.4 will be too. However it always depends on the clock and the silcion lottery.

[igloosfolly]

Wrong yet again Ryzen does not respond well to high voltage.

[tacoshy]

Originally posted by igloosfolly:

Wrong yet again Ryzen does not respond well to high voltage.

has nothing to do with responding to high voltage... more like to do with the VRM of the motherboard.

[igloosfolly]

Wrong again VRM's have been hot for years . https://www.techpowerup.com/forums/threads/vrms-getting-hot.90208/ , ,Most VRM's are designed to go up to 120c the Ir3553 goes to 150c. . http://www.datasheet4u.com/datasheet-pdf/InternationalRectifier/IR35201/pdf.php?id=1089270 , https://www.infineon.com/cms/en/product/power/dc-dc-converter/dc-dc-integrated-power-stage/ir-mosfet-power-stage/ir3553/# Please provide links to substantiate your far fetched ideas.

AMD predicts that most customers should see somewhere between 3.9 and 4.1 GHz across all cores, and suggests you stick with a 1.35V ceiling if you want your chip to last. Although core voltages in excess of 1.45V are considered sustainable, they'll have a more pronounced effect on longevity."

[tacoshy]

there where a lot of issues with ryzen running stock at 1.5V:

https://linustechtips.com/main/topic/867858-ryzen-5-1600x-wrong-voltage/
http://www.tomshardware.co.uk/answers/id-3530745/ryzen-1600x-voltage-problems.html
https://rog.asus.com/forum/showthread.php?92634-Issues-High-CPU-Voltage-on-auto-settings-and-RAM-Problems
https://www.pcper.com/reviews/Processors/Overclocking-AMD-Ryzen-7-1700-Real-Winner

could continue that most ppl have no problem going beyond 1.4V


the problem actually is not VRM heat but that the VRM cant provide stable power. Might getting drained to fast.

[igloosfolly]

Toms Hardware Forums you can surely do better than that. The other articles claim problems with AMD Cool and Quiet voltage fluctuations or hitting a wall. Notice the 7 1700 pulling 214watts at full OC. While the x models pull less power to do the same thing at 150 watts. It is pretty easy to see that more voltage is not the key to OCing here. Read down in the comments people claiming full OC at 1.25 volts to achieve 3.9ghz. Less power is less heat less heat is higher OC. So we can see that Ryzen does not work like Intel or Fx where we pour on the volatge till the chip glows red. The other problem is how MS works with Ryzen. Windows high precision event timer does not work with Ryzen. Maybe 4.1 is the best we can get out of the first Ryzen release kinda harkens back to the FX chips being crippled by MS and by the time MS fixed that the damage had been done. Ask FX owners how much better the FX runs on windeers 10. The bigger problems with Ryzen that no one is talking about is how hot the back of the socket gets.

[tacoshy]

its not liek a Pascal GPU where hotter CPU means it will perform less. Same as Intel you can go as hot as you want as logn as you stay below the point of thermal throtteling... more voltage will always increase stability. while higher clockrate will always decrese it.

[igloosfolly]

How many times do i have to show you that higher voltage to the core of Ryzen does not insure a better OC. Read then read a little more success comes from 1.3875 or less. I have been playing with my Ryzen since early April and applied settings so many times I have a calloused index finger.

[tacoshy]

higher voltage ensures a more stable OC. You saying you dont need a higher voltage just go for another CPU.

Well just because a 1700X can reach a higher clock then the 1700 non-X at the same voltage doesnt mean the 1700 non-X can reach the higher clock without changing the voltage...

Your whole comparission is just dumb by the basic. The basic is simple as that: higher voltage = mroe stability. Just because another CPU modell can reach a higher clock by default with default voltage doesnt mean that a cheaper CPu can do this too...

[TehSpoopyKitteh]

Originally posted by tacoshy:

higher volatge will icnrease stability not decrease it... if 1.3875V will be stable then 1.4 will be too. However it always depends on the clock and the silcion lottery.

If the CPU hits the TDP due to a result of overvolatage, it becomes unstable due to temperature increases.

There is no "silicon lottery" and there's no evidence to suggest that there is. It's just different people using different parts that cause minor enough differences to warrant a DIY side of things to tweaking the performance of one's PC...