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Batman1982
12-09-2017, 10:47 AM
Hi,
i got my new Formula and it works fine.
Bios Version 0802
( ok need a little bit more V-Core to my Hero before but thats ok for me 0,015v more )

But my Vrm Temps are i little bit to high in my opinion.
Ive overclocked my 8700K to 5Ghz with 1,355V Bios LLC5 - after drop in Linx 1,312v .
My VRM temperature is 80 degrees, water is 25-26C ( Mora 420 + 2 480 Radiators) , my current draw is 185W - 190W

That temperature is higher than my previous X299 Rampage VI Extreme with Monoblock and 7900K @4.8GHZ - there i was at 65-70 C with 290W

Is this VRM Temperature normal or is there a issue maybe with the Thermal Pads under the VRM section Cooler?

Does anyone knows how thick the original Thermal Pad is? So i will change the original Thermal to a better one maybe it helps.
Or is 80C ok ? My Hero before did not have a VRM Sensor so i dont know how hot the VRMs are.

Menthol
12-09-2017, 02:18 PM
Well Batman you may be the first person to post with a X Formula
Is your VRM block connected to your loop?
If you want to change thermal pads you may have to remove and check or purchase a couple different thicknesses
Or you can remove VRM heatsink and apply a very thin layer of non conductive TIM, or check the screws that hold the heatsink to motherboard to make sure they are thightened correctly

Hamel_C
12-11-2017, 05:21 AM
I've found same case reports of VRM temp being abnormally high in Korean forums.

The issue seems to be caused by stock thermal pads included within the VRM heatsink; they are not in close contact with the VRM itself.

69514

As you can see in the picture, thermal pads on the top is missing a "pressed mark" from the VRM.

You can probably replace the thermal pads that are thicker to solve this issue.
(But this may void the warranty provided from ASUS itself - can anyone from ASUS confirm this?)

domi1711
12-11-2017, 05:33 AM
Raja, please enlighten us.
How thick should the replacement Pads be?

z0ki
12-11-2017, 10:29 AM
I've finished my Maximus X Formula build and VRMs are perfect. Albeit I have them under water they're literally getting no hotter than 59c

Sent from my SM-G925I using Tapatalk

domi1711
12-11-2017, 12:08 PM
Under what load did you measure the vrm temps? Prime 1344 AVX?
I will test it today and post results.

Hamel_C
12-11-2017, 12:23 PM
Under what load did you measure the vrm temps? Prime 1344 AVX?
I will test it today and post results.

Will be waiting for your result for reference.

Phillyflyer
12-12-2017, 01:49 AM
Just ordered this board...will receive in 2 days and running full custom loop ....will post results on how this board performs @ 5.0ghz.

domi1711
12-12-2017, 10:00 AM
Tested the VRM Temps Yesterday:
latest Version of Prime AVX, 1344K, very mild airflow around CPU Socket (Fan @ 800RPM), VRMs reached 60 degrees (40 deg delta) after 30 minutes -> VRMs were not watercooled!
I think these numbers are fine.
Although this is just one figure. I will check if the Thermal pad makes good contact with the VRMs once i find time.

Hamel_C
12-12-2017, 02:37 PM
Tested the VRM Temps Yesterday:
latest Version of Prime AVX, 1344K, very mild airflow around CPU Socket (Fan @ 800RPM), VRMs reached 60 degrees (40 deg delta) after 30 minutes -> VRMs were not watercooled!
I think these numbers are fine.
Although this is just one figure. I will check if the Thermal pad makes good contact with the VRMs once i find time.Were your CPU overclocked?

나의 SM-G950N 의 Tapatalk에서 보냄

domi1711
12-12-2017, 07:09 PM
5GHz, 1.23V under AVX Prime.

Hamel_C
12-13-2017, 12:33 AM
Update:

I also got my 8700K + Z370 Formula system built today, will get them OC'ed and post VRM temp. test result soon.

Meanwhile, I'm seeing more reports of abnormally high VRM temperatures when OC'ed (approx. 90 C) due to stock thermal pad on the heatsink not being properly attached to the VRM in Korean forum.

These are some screenshot reported cases:
VRM temp. during OC / LinX testing on watercooled system.

69569
69570

Batman1982
12-22-2017, 06:59 AM
i did an Rma for my Formula because of high vrm Temperatures 80+ degrees*
5ghz 1,328v they send it back to me , says no Warrenty because there was a little rest of my Cooling liquid on the vrm cooler.

Ok my fault no problem, so i dismount the Vrm Heatsink and see the Problem
There was only a minor Contact to the vrms.

I replaced the thermal pads with arctic pads. On the long side 2.5mm on the short side 2.0mm
I needed different thickness, so now is perfect contact, not to much pressure.

Vrm temperatur 50Degrees under Linx, now its good

The Image show the original Pad
Thickness 1.5mm
*