Hi guys,

I bought a 7800x3d, and so far I really enjoy it. I'm trying to set PBO + curve optimizer and coming from a 5900x and reading a lot of guides, it looks like best cores should not be able to have lower negative offset than the other ones. But so far my settings are:

core 0 -30

core 1* -35

core 2 -30

core 3** -30

core 4 -30

core 5-30

core 6 -20

core 7 -30

According to Ryzen Master, my best core is core 1* and second best is core 3**.

I rigorously tested these settings with OCCT, prime95 overnight and corecycler, an I had no errors.

So my question is, is it normal that my best core can handle such a low negative offset, lower than the "regular" cores? Also, for core 6, I couldn't get lower than 20, as it gave me errors. That is weird because according to OCCT, it should be the worst core out of them.

Thank you for your answers!

Asking because it seems while browsing that most of them can't achieve anywhere near that and I want to make sure I'm not just hallucinating stability as it's my first Ryzen system ( last AMD system was an Athlon that served me well ).

Here's how it went. I first updated the bios to the latest version from MSI. Then installed Ryzen Master and Cinebench R23 as well as several other stress tests like Prime 95, AIDA, etc. I have the CL30 6000 ram on EXPO settings ( VDDIO lowered to 1.3 manually, EXPO had set it to 1.4 :/ ), also set memory context restore to enabled for the absurdly faster boot times.

Went in -5 steps on the curve optimizer, ran the included Ryzen Master "stress test" for stability, then ran a Cinebench with all apps I could stop stopped in windows for ideal replicability of results ( cinebench results can fluctuate quite a bit even doing this ), anti virus off and everything I could think of.

Noted the results and kept going on with more -5 steps. Turns out that -30 is where if I go any further, I start getting consistent performance degradation. -25 will get worse results, same for -28, -35 and -32.

After that I ran a suite of Prime 95, AIDA, IBT and as many other stability stress tests I could. Then ran a few games ( Helldivers 2, Rimworld, Baldur's Gate 3 and a few others ), browsed, used handbrake and encoded a few videos with AV1, H265 and H264. Watched a few videos on youtube and MPC-HC and finally let it sit idle overnight with only HWinfo64 pinging the processor every 5000 milliseconds for info.

It's only been 24 hours and not a single crash yet. crosses fingers

Is there anything else I should look out for as far as voltages, settings, stability testing goes?

Any particularly finicky apps/games that are more prone to detect instability?

All counsel and tips would be greatly appreciated!

EDIT:

Thanks for the all the feedback. I'll put it to good use! :)

Hello everyone.

Just performed some tests on my 7800x3d and i wanted to share some results from Cinebench.

Cooler: Dark Rock Pro 4 - fan curve set to Standard

Case: Pure Base 500 FX

MB: Asrock X670E Steel Legend

Results:

• CO disabled: 17473 points, max. temperature (c): 88.1, boost clocks 4.8 GHZ

• CO enabled (-30 all cores): 18190 points, max temperature (c): 84.4, boost clocks: 5 GHZ

PC components: 7800x3d, 7900xtx, 32gb ram corsair vengeance 6000mhz cl30, Gigabyte b650 aorus elite ax rev 1.2.

I built my first pc couple of weeks ago and I limit vsoc to 1.2njust for precaution and saw many posts about the PBO and curve optimizer so I set it to -20.

I know CO allows my cpu to run beyond its limit for better performance, but what exactly does it do?

• Does it affect performance in gaming?

• Does it lower temps or increase them?

• Does it affect the cpu lifespan?

• Difference between negative and positive offsets

• And most importantly do I really need it?

Thanks a lot and sorry for asking too many questions!

Hi all,

My 7800X3D is currently scoring slightly below 14k on TimeSpy, ~18,300 on Cinebench R23. Decent scores, but was hoping to squeeze out a bit more with some UV / OC magic.

In my BIOS I YOLOed the curve optimizer all the way to -50; figured I'd let it crash and work my way up from there.

But nothing changed. No difference in thermals, no instabilities, benchmarks all the same. I opened Ryzen master to try and load the BIOS settings and it keeps telling me that CO is turned off even though it's very clearly set to 'all core -50' in BIOS.

Am on latest chipset drivers as well as bios.

What gives? Anybody have any thoughts? What's a good way to verify my CO settings?

TL;DR: Lower PPT to reduce temperatures! For my ASRock B650E the settings are: Advanced > AMD CBS > SMU > PPT in mW set to 75000.

For those of you who do not like their x3d processors to run at 85+ degree temperatures, I've got a little trick for you to get peace of mind when running 100% loads on these chips.

My 7800x3d would run at 82-84 degrees and the fans on my AK620 would ramp up to 100%. I my quest to silence my build (in a North Mesh) I decided to run the fans at 40% until 90 degrees. That worked! However, CPU would run 88-90 degrees. Since I don't really like those temperatures, I went further and tried to reduce the power draw. I had already set -30 as negative offset for the curve optimizer, but this did nothing to power draw or temperatures (my previous Ryzen 5 7600 dropped from 90 watts to 78 watts and dropped 10 degrees).

I have an ASRock B650E Steel Legend, and with ECO mode set to enabled, nothing changed again. So I got tired of it and ran Ryzen Master to see where my limit was. PPT was at 100% limit and 90W, so I went through all pages of my motherboard to try and limit that.

I found the correct setting! I could limit PPT to 35W, 45W, whatever I wanted. I finally set on 75W, still using the -30 negative curve optimizer and +150 MHz positive PBO clock. Reaching 68-69 degrees and 4.7 GHz in Cinebench R23 I'm very happy! This means a drop in almost 20 degrees with fans set to 40%! Cinebench scores still get me over 18000 in R23, other benchmarks at stock show around 18100 to 18200 scores

Here's a Ryzen Master screenshot when running Cinebench R23:

https://i.imgur.com/rlQY7Bz.png

Not sure where to find this for other brands, but for my ASRock B650E the settings are: Advanced > AMD CBS > SMU > PPT in mW set to 75000.