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

random_matt · 6 Feb 2021 at 19:46

Trying adaptive should only be configured once you have done a OC normally. No idea what voltage offsets are occurring.

Someone else can chime in, no idea really.

wookiee87 · 6 Feb 2021 at 20:11

a 10850k all core 4.8ghz is expected to get quite hot regardless of what cooling you have, still 85 degrees under 100% is pretty good tbh, before the 10th gen released the leaked performance showed they all ran hot so your not an isolated case, if all of the 10th gen chips from intel ran at stock sped with no boost they would all pull 125w and temps would be well under control but it doesn't, factor in thermal verlocity boost or push a high all core clock and the cpu will pull close if not more than 200w+ all that aditional power in such a small area will make the silicone temp sky rocket and thats why your chip is warm.

if you want slightly better temps look at a 360mm aio, not gonna lie it may drop temps at best by another 10 degrees but you wont see much more than that

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

wookiee87 · 7 Feb 2021 at 00:30

Lael Traylor said:
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.

i'm sorry i cant be of much more help, i moved from intel back when amd's next gen ryzen released, i managed to get a 3900x and now i have a 5950x so have lost touch with overclocking intel a bit, you could try setting a manual cpu ratio of x45 in the bios and keep backing down the voltage until you hit instability within windows, that was you'll be running your cpu at the lowest possbile temp, you say its a work pc so stability and longevity should be paramount, pushiing 4.8/4.9ghz long term can be tricky and you'll have a very small performnace bump vs a lower more stable clock.

when you finally find the lowest voltage then you could apply a -/+ offset to see if the pc remains stable, it all depends on your chip

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.

wookiee87 · 7 Feb 2021 at 03:36

Lael Traylor said:
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.

9th, 10th and the upcomming 11th gen are all mega heat generators, its the nature of the 14nm process intel are still on, when they shrink down the node then the power usage will drop significantly and the performance windows will close to amd, you could look at delidding but that carries a massive risk now as intel use solder between the die and the ihs, its doable and the benifit is much the same as a few gens back, the flip side is if you do it wrong you kill the chip 100%.

where you have it now running at 85 degrees i'd call it a day and leave as is, if temps start to climb you may need to repaste or buy a better cooler

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.

wookiee87 · 7 Feb 2021 at 17:43

have you set a manual voltage in the bios of 1.25v, to me 1.42v under load does seem very high to be honest and may be why the chip is running so hot.
i'd have a play and see whcih manual vcore voltage your chip likes to run at but don't exceed 1.325v, your on air so anymore than that and heat will become the issue again.

someone may chime in about offset voltages but thats not something i'm familar with, i use manual voltges and back them down until i find instability