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4.5GHz vs 4.8GHz all core can be a difference due to the type of load. The processor wont have the same clocks in Cinebench vs. Linpack or yCruncher for ex.
 

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It works much the same way as to Fmax so yes, the more the better. Fmax is 5050 now

You have access to the expanded CO envelope down to -50. I run -35 though, -45 is doable for benches but not stable. -50 daily stable would be impressive.

Hold on...didn't you have a 12600K?

refunded 12600k because this deal was too good to pass up.


I set mine to -30 offset in PBO. It let my all-core effective clock boost as high as 4.8Ghz (up from an average of 4.5Ghz).

I will do -30 thanks
 
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The default TDP for the 7800X3D as far as I know is 120W according to AMD's own website: https://www.amd.com/en/products/processors/desktops/ryzen/7000-series/amd-ryzen-7-7800x3d.html
While we know Intel's shenanigans AMD is doing its share of... stuff with TDPs as well. 7900X and 7950X have stated TDP of 170W and power limits at 230W, 105W TDP Ryzens have power limit of 140W and 65W Ryzens have 88W. Yes-yes, the official word on that brings in a nice complex formula dealing with cooler efficiency and a bunch of parameters but that is just obfuscation.

TDP for 7800X3D is stated to be 120W. Its power limit is at 76W. Basically all X3D models are special in a way that they are rather "unhungry". Apparently because the cache dies or the way they are put together does not like high voltages-heat.

Edit:
In light of the recent Intel stability news, has anyone encountered the same "out of VRAM" errors with Unreal Engine games with tweaked Ryzens? I was seeing those and after the news broke on CPU stability being the cause changed the CO from -30 to -15 on my 7800X3D and while I have not had much time to play since then I have not yet encountered the same errors while these were rather common before.
 

Space Lynx

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cause changed the CO from -30 to -15 on my 7800X3D and while I have not had much time to play since then I have not yet encountered the same errors while these were rather common before.

so you use -15 on your 7800x3d and not -30? do you recommend a new 7800x3d owner use -15 over -30?
 
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so you use -15 on your 7800x3d and not -30? do you recommend a new 7800x3d owner use -15 over -30?
Every individual CPU (and core) will have a different threshold for a negative CO. Some good samples may work great at -40 and others may not make it past -15. It’s always best to do per core to find the best possible undervolt for each, but that can take some time and effort. Lots of people just pick a safe all core number and work from there.
 
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TDP for 7800X3D is stated to be 120W. Its power limit is at 76W. Basically all X3D models are special in a way that they are rather "unhungry". Apparently because the cache dies or the way they are put together does not like high voltages-heat.
Power limit for any Ryzen is TDP×1.35. For the 7800X3D, it's 162 W, only that it never gets anywhere near. It's actual power consumption in Cinebench is around 80-90 W depending on memory configuration.

The default TDP for the 7800X3D as far as I know is 120W according to AMD's own website: https://www.amd.com/en/products/processors/desktops/ryzen/7000-series/amd-ryzen-7-7800x3d.html
Like I said, I'm not talking about TDP. I'm talking about actual measured power consumption, which has nothing to do with TDP.
 

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Power limit for any Ryzen is TDP×1.35. For the 7800X3D, it's 162 W, only that it never gets anywhere near. It's actual power consumption in Cinebench is around 80-90 W depending on memory configuration.

Like I said, I'm not talking about TDP. I'm talking about actual measured power consumption, which has nothing to do with TDP.

Technically yes, but at a certain point talking about 162W gets pretty pointless considering the CPU really only ever reaches just over half of its PPT in just about any workload. It's quite the different story compared to 5800X3D.

Every individual CPU (and core) will have a different threshold for a negative CO. Some good samples may work great at -40 and others may not make it past -15. It’s always best to do per core to find the best possible undervolt for each, but that can take some time and effort. Lots of people just pick a safe all core number and work from there.

I think 8-core owners have just been spoiled. Getting real entitled with "just set -30, bro" :laugh: wait till they get their hands on a 2CCD CPU and learn what per-core variation is all about
 
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Technically yes, but at a certain point talking about 162W gets pretty pointless considering the CPU really only ever reaches just over half of its PPT in just about any workload. It's quite the different story compared to 5800X3D.
Exactly. :) That's why I never talk about TDP regarding an AMD CPU.
 

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Technically yes, but at a certain point talking about 162W gets pretty pointless considering the CPU really only ever reaches just over half of its PPT in just about any workload. It's quite the different story compared to 5800X3D.
Interesting.. so you AM5 X3D guys would never see anything like this?

Screenshot 2024-05-02 211157.png


I have never been able to get close to maxing EDC on this CPU.. kinda bugs me a little because I do not know how :D
 

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Interesting.. so you AM5 X3D guys would never see anything like this?

View attachment 346036

I have never been able to get close to maxing EDC on this CPU.. kinda bugs me a little because I do not know how :D

I don't think I have seen anyone ever reach even 120W on 7800X3D.

Well, since 142W is set in stone, you won't be able to max out EDC except by reducing it.
 
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Interesting.. so you AM5 X3D guys would never see anything like this?

View attachment 346036

I have never been able to get close to maxing EDC on this CPU.. kinda bugs me a little because I do not know how :D
Nope. :) This is an all-core Cinebench run with a full boost at 4.8 GHz. Everything is on stock/auto.

1714718210808.png


My RAM is at 4800 MHz, VSoC at 1.0 V, but if I run it at 6000 MHz with VSoC at 1.2 V, I only get a couple of Watts more on the CPU package power. I just don't because it doesn't make a lick of difference. :D

Even getting much over 135W on a dual CCD is hard.

View attachment 346043

View attachment 346044
What kind of black magic is that? :eek: My 7700X ran at 142 W (max PPT) in all-core loads.

Edit: Oh wait, you're on X3D, too. I take my question back, silly me. :laugh:
 

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@ canadian mods:

Minimum Thermalright for a 5950X?
 

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Does the PS120SE have PWM fans?
 

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I haven't run my 5900X at stock CPU settings since I got it I think lol.. its actually pretty well behaved. Not so rowdy :D

stock.png


Screenshot 2024-05-10 173047.png
 

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@ canadian mods:

Minimum Thermalright for a 5950X?

Minimum? 5950X is one of the easiest AM4 CPUs to cool. You could probably adequately cool a stock 5950X with something like a SI100, if not even lower.

If you want to actually push the 5950X? Then you're looking at the usual suspects - FC140, PS120EVO, etc.
 

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I set mine to -30 offset in PBO. It let my all-core effective clock boost as high as 4.8Ghz (up from an average of 4.5Ghz).

single core boosts should still be 5.1 ghz correct? all 4.8ghz?

just want to make sure my numbers are right with -30 :)
 
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refunded 12600k because this deal was too good to pass up.




I will do -30 thanks

Yoyo, from that MC fomo 7800X3D thread lol... Ended up have to go up on MB due to stock.

20240511_114448.jpg
 

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Yoyo, from that MC fomo 7800X3D thread lol... Ended up have to go up on MB due to stock.

View attachment 347024

yep the microcenter Mobo situation is bad everywhere. but the $196 7800x3d makes up for it.

my friend got a 7800x3d irl and backed out, he is just too afraid to build one and wants to stick with crap laptop.


edit: holy shit you got some nice ram
 
Last edited:

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Making another effort for 6400 this weekend. I think a lot of people complaining about high run AIDA latency ~70ns+ are only running it once. Power Down Mode seems to handicap the first run significantly, but not successive runs.

7800x3d 61.3 not safemode.png


single core boosts should still be 5.1 ghz correct? all 4.8ghz?

just want to make sure my numbers are right with -30 :)

Fmax is 5050. I don't think there's a hard limit preventing you from doing 5050 all-core; the workload just needs to be light enough, cooling good enough, curve optimizer low enough.
 
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Making another effort for 6400 this weekend. I think a lot of people complaining about high run AIDA latency ~70ns+ are only running it once. Power Down Mode seems to handicap the first run significantly, but not successive runs.

View attachment 347044



Fmax is 5050. I don't think there's a hard limit preventing you from doing 5050 all-core; the workload just needs to be light enough, cooling good enough, curve optimizer low enough.
RAM tweaking on AM5 vs. AM4, any thoughts? :D
 
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