MSI Z490 Tomohawk heat issues stock/default settings.

Lael Traylor · 6 Feb 2021 at 02:39

Hello all,

So I have been trying to find a decent base voltage and cou power settings for a MSI Z490 Tomohawk. I am currently at 1.25 volts at 4.8ghz all core. My temps are still high @ 85c. On default settings I was hitting 100c!

So I am trying to figure out if this cpu is indeed hot or just overvolted by the board. This was the reason for the manual undervolt to 1.25vcore and IO 1.15v and SA 1.2v. Temp now peak at 85c under realbench 16gb ram stress test.

What I noticed was the LDP and SDP were default 4094 watts!! I manually set LDP 125w and SDP 250w. Now when the short duration is up the wattage drops to 125 but the cpu throttles to 4.5ghz down from 4.&ghz. Auto settles at 175w LDP which doesn’t change from SDP to LDP. On auto it just stays at 175w indefinitely.... I am pretty sure this is excessive so just wondered what to do? Don’t understand why stock 4.8ghz gets throttled so hard at 125w. Was wondering what others experiences were with LDP and SDP wattage and SA/IO voltages on 3600xmp? I just don’t feel like stockdefault settings should be hitting 85-100c on a Noctua D15 in a Meshify S2.

Lael Traylor · 6 Feb 2021 at 02:50

These are my current settings and sorry for the wall. First new build in 10 years and first intel build ever. Don’t want to kill it because MSI were overjuicing the board for no reason. Should have stuck with ASUS.

Lael Traylor · 6 Feb 2021 at 02:52

Lael Traylor · 7 Feb 2021 at 00:01

Thanks. That’s what I have been thinking but either the default voltage spiking as high as 1.37 on a 4.8ghz default setting I was not happy.

As you can see I have set it to LLC 3, vcore 1.25 and set to adaptive as that was what the default is at basically. I am not sure how to manage an offset of adaptive+offset so I was leaving the vcore mode at adaptive or auto but that would still draw a lot of volts at idle. 1.28 max. I set the adaptive and max vcore is 1.26 under load but the system is stable and temps under control. Should I just change adaptive back to auto as I am not overclocking. There just isn’t any headroom on air. 90c plus on 4.9ghz under realbench 16gb ram stress test. With an AIO I could get 4.9 or 5.0 stable but this is a work computer so it needs to be stable for the next decade. I don’t want water in the mix.

Lael Traylor · 7 Feb 2021 at 00:02

Also pushed IO down to 1.050v and SA to 1.15 stable.

Should I mess with PL1 and PL2 to lower temps? At 125v LDP (PL1?) the cpu tops out at 4.5ghz so I suspect I could set PL2 (long power) to 150-160 and it would be stable at 4.8 and even lower temps. Air cooler setting in MSI BIOS set PL1 & 2 to 288w....

Also wondering why LLC/Ring voltage is at 1.280v and if I could set that lower? Should I leave this at default? Was so hoping for 4.9ghz!

I was wrong about adaptive so thanks. I think what I want is an adaptive negative offset? On auto it runs stable at 1.42vcore with a bios setting of 1.25v. Thank for the comment @random_matt

Lael Traylor · 7 Feb 2021 at 02:45

Sorry I should’ve been clearer previously. The 10850 K has a 4.8 GHz core clock with a 5 GHz boost clock.

I have set it to 4.8 all core and lowered the voltage to 1.2 vcore and get better temps under 100% load than I did with stock settings.

at this point I’m just trying to see if there’s any way that I can get those temperatures down further and it doesn’t appear to be. There is only one of the voltage that I haven’t played around with and that is the ring ratio voltage or LLC/ring voltage. I reduced the temperature requirement for 100% fan speed and that keeps everything comfortably under 85 Celsius as it was sitting on around 85 Celsius previously and 85 Celsius was the trigger point for 100% fan speed.

The really is very little else I can do at the moment as this chip just needs to much voltage at 4.9ghz all core. I think to get that even remotely stable I would need 1.375v vcore but temps were in the 90c+ range. That’s just too hot so it became about getting the cpu stable at 4.8ghz all core with less heat and voltage on RAM and CPU. I have achieved this with the 85c ceiling which I will never hit work wise. Worse case I set back to stock setting.

I just cannot believe how hot these chips are. Water really is almost a must. Stock and the Noctua D15 is good but either this chip really blows or it’s just a the 10***k series are just glorified ovens.

Lael Traylor · 7 Feb 2021 at 17:09

Yeah I am leaving everything where it is. Thanks for the advice guys. One last question...

If I am running stable with LLC 3 and 1.25vcore with an actual voltage of 1.42vcore under load should I use an adaptive + negative offset and set the offset as 0.008v? That willl lock the voltage at 1.42v when under load right?

I can leave it on auto but just trying to understand - offset.