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VRM on the new AM4 motherboards

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post #3471 of 3497 (permalink) Old 07-09-2019, 03:09 PM - Thread Starter
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Quote: Originally Posted by AlphaC View Post
https://www.anandtech.com/show/14161...ard-overview/2


Update on Asrock X70 Pro4 & Phantom Gaming 4 : UP9505PQGW PWM (4+2), UP1961SQ PWM doubler, UP1962SD mosfet


UP1962 only lists as a driver
https://www.upi-semi.com/en-article-upi-681-2161#


I don't know if this is correct (a SIC634 is also listed as a mosfet rather than powerstage) but that is what Anandtech lists


The Asrock X570 Creator apparently is using IR3555 with IR PWM not the SIC634 / SiC632 powerstages.

The Phantom ITX is listed as 8x ISL99227 (60A smart powerstages with exposed top) that they used on Z390 , except doubled using ISL6617.

Also it seems the STRIX X570-E uses ASP1405I PWM (IR35201 likely) while the X570-F uses the ASP1106 cheaper PWM.
Thanks for a heads-up on the new info. All I had was preliminary info/speculation up to now regarding most ASRock boards. Took it's time for some better data to come up regarding their boards.
Though seems there is some question marks on some the data Annandtech had gotten. Seems not correct at a first glance to earlier info we had on some boards.

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post #3472 of 3497 (permalink) Old 07-11-2019, 04:37 PM
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anyone Polish?


6:51 testing on 570 Gaming Plus from MSI is around 83°C but then there's an asterisk with 91°C

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post #3473 of 3497 (permalink) Old 07-11-2019, 08:28 PM
 
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https://nguyencongpc.vn/tren-tay-bo-...-steel-legend/
Seems X570 Steel Legend uses SiC632A Dr.Mos, 8(4*2)+2 Phases with ISL69147 controller.
So Extreme4/Phantom Gaming 6 may use this VRM as well.

(I realized that anandtech shows SiC634/SiC632A on their list, so maybe there are two versions of these boards?)

https://www.vishay.com/docs/62992/sic632a.pdf
https://www.vishay.com/docs/76784/sic634.pdf
The graph shows that SiC632A is a little more efficient than SiC634 which is used on Taichi?


Edit: ASRock puts a "huge"(for 2 phases) heatsink on the 2 phases SOC VRM, with no heatpipe linked to the Core VRM heatsink(which needs to handle 8 phase for VCore). Really can't get that.

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post #3474 of 3497 (permalink) Old 07-11-2019, 08:38 PM
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[PCGH] torture test Aorus X570 Xtreme passive cooling capacity using Ryzen 9 3900X with Prime95 w/AVX and The Witcher 3

this one has subtitles and you can use auto translate

Result 11min mark - 55.4°C average with 57.3°C max


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post #3475 of 3497 (permalink) Old 07-11-2019, 10:11 PM
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Quote: Originally Posted by AlphaC View Post
anyone Polish?
6:51 testing on 570 Gaming Plus from MSI is around 83°C but then there's an asterisk with 91°C
he said
7:20 without cooler 115C MOSFET (he had open stand airflow while testing)

There also review with 80C @ B350 3*2 in parallel.
link
They say 190W, which is 135A @1.4V. There no 22.5A @80C MOSFETs in B350-B450 boards.
I think it was throttle or weak review.

10-phase Gigabyte Z390 Gaming X (same VRM as Gigabyte Z570 Gaming X) was not able to overclock 9900K.
I think CPU with 9900K consumption level (3900X) should not be used with an 8,10-phase MOSFET boards.
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post #3476 of 3497 (permalink) Old 07-12-2019, 02:55 AM - Thread Starter
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So seems the weaker 8-10 phase design with individual high/low-side mosfets like the Onsemi VRM from MSI/Gigabyte designs is bare minimum for the 12-core and that is counting on active cooling for the VRM to keep them from hitting max temperatures to throttle and such?
Passive they overheat it seems from what we can gather.

Sure in the older boards they were meant tops for 8-core and manage but the new 12 & 16-core chips will draw more power even if TDP is 105W for these parts? PBO-settings <-- I reckon.

It's interesting the stock 3900X power draw topped out at 144W on the Gigabyte AORUS X570 Extreme temperate test of passive PCH. But then they drew more power on the cheaper boards?
Maybe they ran them un-gimped to get them to overheat but should be ok stock without PBO cranked up?

Seems techspot tested them all 144W stock all the way to max 195W with stock cooler and no other cooling(ok temps?). Not the same scenario as CLC or a tower cooler that I had seen above or otherwise when they overheat.

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Corsair LPX 2x8Gb 2666C16R @ 3200Mhz 14.(17).17.17.31.49...(260) 1T1.470V (Micron B-die 25nm)

Last edited by Nighthog; 07-12-2019 at 03:04 AM.
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post #3477 of 3497 (permalink) Old 07-12-2019, 04:34 AM
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Quote: Originally Posted by Nighthog View Post
It's interesting the stock 3900X power draw topped out at 144W on the Gigabyte AORUS X570 Extreme temperate test of passive PCH. But then they drew more power on the cheaper boards?
When you disable AMD automatic OC it remove power draw limitations too.

Another B350 + 3900x review. With thermal images and good description of how it was tested
link
They actually measure coil temperature. MOSFET itself can be +10..15C easy inside chip.

While B350 kinda lowest option
most B450 boards have same 4-phase VRM, with 2 mosfet in parallel.
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post #3478 of 3497 (permalink) Old 07-12-2019, 06:16 AM
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Dont know about Asus but Gigabyte PCH fan is reported to run in full speed and a Giga rep post a message about a BIOS update to address the issue. It is just unbelievable. I was planning to get an Elite or Pro but now looking for a Pro Carbon since Ace does not have local stocks as well. Or I will just use my CH7 which is waiting in brand new box either to be replaced or be deployed.
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post #3479 of 3497 (permalink) Old 07-12-2019, 08:13 AM - Thread Starter
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Quote: Originally Posted by XZ G View Post
Dont know about Asus but Gigabyte PCH fan is reported to run in full speed and a Giga rep post a message about a BIOS update to address the issue. It is just unbelievable. I was planning to get an Elite or Pro but now looking for a Pro Carbon since Ace does not have local stocks as well. Or I will just use my CH7 which is waiting in brand new box either to be replaced or be deployed.
BIOS is already out with the Fan fix/profiles.

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Corsair LPX 2x8Gb 2666C16R @ 3200Mhz 14.(17).17.17.31.49...(260) 1T1.470V (Micron B-die 25nm)
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post #3480 of 3497 (permalink) Old 07-12-2019, 02:50 PM
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Quote: Originally Posted by Haelous View Post
As far as I know, no one but MSI has fan stop. Asus, Asrock, and Gigabyte do not.

There are reports of Gigabyte and Asrock fans either being stuck at 100% or being noisy. In the case of Asrock, the issue happens even when you change the mode of the fan in the BIOS. It's possible these are defective fans, boards or BIOS, but if you buy now this is what you risk getting.

I haven't seen any reports of Asus fans being noisy, but they do run all the time.
Good to know. Any MSI X570 woth buying?

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