PC Processors

[yazx]

UPDATE: Actually it gives better boost clocks but worse performance, in Cinebench R20 i used to get 4000, setting the voltage to offset mode and properly adjusting it boosted the score to 4700, but temps now around 70s-80s in stress tests and 65 in games.

hi all,

i'm coming from intel 3770k Oced to 4.5 Ghz, i always owned intel and this is the first time i own an AMD CPU. so as usual Ryzen OC doesnt work like intel, etc....

i tried alot of scenarios and voltages, the best experience i got is from setting the voltage to 1.0 in bios, PBO to 200 Mhz and in windows set the power plan min CPU 90% and Max CPU to 100%.

the catch is CPU voltage is always 1.4v+ and doesnt drop when idling, but with this config i get 4250 boost on all cores with 62 degrees full load, 35-40 degrees on idle.

raising the voltage in bios results in higher temps and less boost frequency, as an example, setting the voltage to 1.1, boost max 4150 and temps in 70s at full load.

i dont get whats going on and why it behaves like this, if anyone can shed some light on it and let me know if i can achieve the same result with voltage drops when idling would be appreciated. 

[cosmicdance]

There are a lot of people reporting high temperatures with the Ryzen 3000 chips.  

I found that with my 3700x and my previous 2700x setting a negative voltage offset of - .100 v kept temperatures around 62c and still maintained good boosting speeds.  

So the BIOS are setting voltages too high as far as I am concerned as you have discovered yourself that lowering voltage reduces temperature and actually improves performance.  

As for your idle I would try setting minimum CPU to 10% so that it will reduce the voltage and speed.  

Andy

[yazx]

setting min CPU to 10% causes some stuttering when going out from idle to moderate/full usage, and a weird thing happens, whatever i set the min cpu now, it doesnt take any effect, i checked ryzen master and voltage is 1.45+ , lol i have no idea on whats going on, perhaps i need a pc restart?

[shinkojiro]

Ryzen 3900X Performance @ 1.00V - I Was Wrong.. - YouTube 

Give this a look.

[yazx]

i know this vid and watched it earlier, even Steve from Gamers Nexus commented on it and said its not necessarily wrong, he said something about clocks stretching which gives better performance, so in my case it gives better results, in games, i get higher FPS, CPU boosts to 4250 Mhz, in cinebench i scored 4000-4012 on multi-core test at 1v where as 1.1v and 1.2v, i get around 3700-3800 score, lower FPS and max boost to 4150 Mhz.

i'm not sure how and why but perhaps the 3900x behaves differently or due to higher cores/threads counts, games and apps are still not getting the proper utilization for higher cores CPUs.

[shinkojiro]

Taking forever for my youtube link to pass moderation  But, on youtube, Optimum Tech has a video about how he was wrong in another video about 1.00V bringing performance increases for his 3900x.

OFC just as I post this, my other post is approved