AMD 3950+ Issue

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qtqc1

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Hello everyone, I am having a small issue with my 3950 and looking for some input. I originally had the CPU with a Crosshair Vii. Worked fine and I had it overclocked to 4.35ghz without an issue. I simply adjusted the clock rate and left the voltage on auto. If I recall, temps never went above 70-72c under load. I have a Corsair H115 Pro as the cpu cooler. I picked up a Gigabyte x570 Aorus in order to get the second nvme. I am having some very high temps under load, around 97c. I redid the thermal paste just to confirm no issue there. To OC this motherboard requires more adjustments. From my research online, this is what I have changed
Clock to 43.5
Vcore- from 1.42 to 1.45 doest make much difference on the temps
Vcore Soc 1.25v
CPU Vdd18 2.0v
CPU Vddp +.2v
PM_CLDo12 1.25V
PM_1VSOC 1.2V
PM_1V8 1.84V


Can anyone recomend or have some better settings. Basically I was at a stable 4.35ghz so hopefully i can get there again
 
SOC 1.25V :Yikes: Are you trying to get 1900 FCLK or get memory stable at 3800?

97C: Don't you have thermal shutdowns at 95C?
Did you pay attention to the actual vcore the Asus board was using to get you 4.35 stable?
 
You're running a lot of high secondary voltages, especially the SOC at 1.25v. I'm not sure that effects those have on Ryzen, but I have a feeling they aren't going to help with temperatures. I do know that SOC at 1.25 can also cause issues with NVME drives. How does your chip run with everything on auto? What kind of CB20 multi score are you getting? Where do the cores sit during one of those runs? How are temps? Start there before cranking up to 4.35.
 
Dont remember the Vcore on the asus. I probably should of. As it never was an issue, never noticed it before.
I set everything on my setup to default now and under load the temps max around 65c. I know its a long shot but if anyone had a Gigabyte x570 Aorus and a 3950 i would be interested in there settings
 
Hello, please see below my cinebench r20 numbers. This is stock cpu and xmp on(ddr4-3600). Temps max was 62c



1583128586635.png
 
the SOC voltage was definitely too high, no reason you should need 1.25v. as far as cpu voltage goes. i'd just start at 1.43v and reduce it til it's either unstable or you start seeing performance degrade. the 3950's tend to overclock better at lower voltages than the 3900x and lower chips but also remember that all 3950's have 1 chiplet that's usually top 1% while the second chiplet is slightly worse so one may work at 4.35Ghz at say 1.4v but the other chiplet might have to be at 4.3Ghz for 1.4v so play around with that option as well if you want.

also based on your temps i'm going to venture that on the crosshair VII the cpu likely wasn't running at 4.35Ghz even though it said it was. zen 2 can reduce performance to hold stability vs just instantly black screening/bsod.
 
SOC should be 1.1, and I would start lower than 1.43 on the CPU. Try not to get over 1.325V so you do not kill the chip and make it to hot. I can get a solid 4.3Ghz on my 3900x at 1.325V. If you are trying to just get an all core OC. Personally I like using the tweaks for EDC, TDC, and PPT and keep the CPU on PBO and Auto OC and I get all core 100% boost to 4.275Ghz on my 3900X and single core of 4.65Ghz on two cores. The rest on CCD1 hit 4.6Ghz. Below is my R20 scores with those settings and the 1usmus power plan. That power plan increased my single core score from 515 to 528. All the info was found here. https://www.overclock.net/forum/13-amd-general/1741052-edc-1-pbo-turbo-boost.html
 

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Jamie Marsala said:
SOC should be 1.1, and I would start lower than 1.43 on the CPU. Try not to get over 1.325V so you do not kill the chip and make it to hot. I can get a solid 4.3Ghz on my 3900x at 1.325V. If you are trying to just get an all core OC. Personally I like using the tweaks for EDC, TDC, and PPT and keep the CPU on PBO and Auto OC and I get all core 100% boost to 4.275Ghz on my 3900X and single core of 4.65Ghz on two cores. The rest on CCD1 hit 4.6Ghz. Below is my R20 scores with those settings and the 1usmus power plan. That power plan increased my single core score from 515 to 528. All the info was found here. https://www.overclock.net/forum/13-amd-general/1741052-edc-1-pbo-turbo-boost.html
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I followed your recomendation. I also found a YT video that helped as well


I managed to get my CB 20 score at 9327. Max temp is 72c. It is a bit less than I was getting before but seems to be ok. Will do some more testing and gaming and hopefully it holds ok. I noticed with the multiplier and vcore on auto, they do jump around a bit. Would there be any benefit to adjust the memory multiplier or xmp high frequency support at all?

1583132299123.png
 
qtqc1 said:
I followed your recomendation. I also found a YT video that helped as well


I managed to get my CB 20 score at 9327. Max temp is 72c. It is a bit less than I was getting before but seems to be ok. Will do some more testing and gaming and hopefully it holds ok. I noticed with the multiplier and vcore on auto, they do jump around a bit. Would there be any benefit to adjust the memory multiplier or xmp high frequency support at all?

View attachment 227262
Click to expand...


Probably not on your R20 score but all around of course tweaking the RAM will help in other areas. I run my 3600 ram at 3800 with my infinity fabric at 1900 and it helps a great deal in memory benchmarks of course but every where else as well. Faster memory is always better.
 
Jamie Marsala said:
Probably not on your R20 score but all around of course tweaking the RAM will help in other areas. I run my 3600 ram at 3800 with my infinity fabric at 1900 and it helps a great deal in memory benchmarks of course but every where else as well. Faster memory is always better.
Click to expand...

See other thread, but 1900 mhz memory was faster in AIDA64 and slower in R20 for me.
 
I jumped up the ram to 3800 with a clock rate of 1900. Similar to the person above, not much difference in CB. Before the increase in ram speed the system was stable gaming for 2 hours yesterday. Going to test again tonight with the new speeds and hopefully its stable.

1583261526146.png
 
I get 9900 points in cb20 when I set affinity to 16/32 enulating a 3950x with my 3960x. I dont use manual overclocking and my numbers are higher. Just let the chip do its own clocks. Best performance that way.
 
With my 3800x, I've had best results with PBO set to OFF. I also set the vcore to 1.35 max. (Asus X570-i motherboard).
 
I would say your main problem is too much voltage. I know just raising mine .02v makes 5 or more degrees in temp. I am air cooled but even your AIO will respond in similar fashion. I am attaching a couple screen shots, one of my Cinebench score and another with my CPU voltage reduced running two instances of handbrake converting some 1080 mpg to HEVC 265. ha.d been running about an hour when that was taken earlier today.

CB20.png
HB.png
 
What board you using?



Ancient_1 said:
I would say your main problem is too much voltage. I know just raising mine .02v makes 5 or more degrees in temp. I am air cooled but even your AIO will respond in similar fashion. I am attaching a couple screen shots, one of my Cinebench score and another with my CPU voltage reduced running two instances of handbrake converting some 1080 mpg to HEVC 265. ha.d been running about an hour when that was taken earlier today.

View attachment 227468View attachment 227469
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Voltages are definitely too high for everyday use with that cooler. Anything above 1.35v vcore is asking for trouble and higher temps, like an earlier poster said 1.325v is the comfort zone. Keep in mind there are some cases where lowering voltage will actually yield better results due to the decrease in temps.

You may want to try individually tuning each CCX. The first CCX can usually clock higher, with lower voltage requirements, and at better temps, but ymmv. I went this route to hit 4.4 on CCX1 and 4.25 on CCX2 while lowering my temps about 8c under load. You'd lose out on the "all core" feeling though.
 
With the tweaks for EDC, TDC, and PPT I made, would you recomend OC the cpu to 4.3 now or cant do both?
 
tangoseal said:
I get 9900 points in cb20 when I set affinity to 16/32 enulating a 3950x with my 3960x. I dont use manual overclocking and my numbers are higher. Just let the chip do its own clocks. Best performance that way.
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I guess it depends. For me it's not really true, the main reason I got a 3950x is for encoding HD TV shows to x265 for archiving. There is nothing else I have done that seems any quicker than it does on my old 4770k Intel setup. Earlier today I did a quick bench with all stock settings except I enabled XMP for the memory on 1st and then rebooted with my 24/7 settings (xmp isn't stable for 24/7 use is why the speed and setting are different) with Cinebench 20 and on the single core scores were quite similar but wasn't even close on the all core. I will attach a screen shot of each.
 

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qtqc1 said:
With the tweaks for EDC, TDC, and PPT I made, would you recomend OC the cpu to 4.3 now or cant do both?
Click to expand...

All core oc is not worth it in a mixed load environment. Unless you are doing rendering 24/7 it's not worth it imo, especially if you go over maximum FIT safe voltages.
 
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