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VRM on the new AM4 motherboards

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post #3681 of 3699 (permalink) Old 06-22-2020, 03:51 AM
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Really appreciate your answer.

So on stock settings B550M pro should be OK, but any tuning would make it hot. The cpu cooler I will be using is be quiet Dark Rock Pro 4, where the middle fan is positioned little below the heatsink so it should provide some air for VRM heatsink but I suppose that it will not be enough. It looks like that the Elite is more robust and it will have more headroom in case of experimenting with OC. B550 Elite has the same VRM like B550 Pro AC, which according to the HUB video runs pretty cool even with 3900X OCed. But Pro AC has better heatsink, so it will be interesting how this different heatsink on Elite will handle heat output of the VRM.

Thank you, I hope there will be some more reviews
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post #3682 of 3699 (permalink) Old 06-22-2020, 04:45 AM - Thread Starter
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When I mean a VRM FAN, I mean a literal FAN attached directly to the VRM heatsinks, not in close proximity like a CPU cooler, a separate fan on the VRM only there to cool the VRM, older AMD 50-60mm sized fan's are decent enough to cool if you place them right above.

I used such a solution on my older B350 with 4+3 4C06/4C10N [1x2] parts when OC:ing my Ryzen 1700 to ~4.0Ghz. You could reach 100C+ on VRM with ease if pushing Prime95 smallFFT. You want that FAN on there. Stock there isn't a issue. OC with 140W is a issue.
And a 3950X can pull close to 200watts if pushed to the limits, but maybe normal usage is 160-180 maximum for most people... You see it's not enough. It's not designed for that high wattage/current.

3950X has a 142watt limit in stock configuration. It's barely able to manage that in passive mode I would guess, it will get hot 10+3 4C06/4C10N [1x1].

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 18.27.24.48.90.tRFC 680 1T 1.650V [Micron Rev.J]
4x8GB 3800/1900 13.23.17.30.66.tRFC 600 1T 1.700V Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron Rev.E 19nm [D9VPP]),
2x8GB Kingston HX436C17FB3K2/16 3600C17 1.35V (Micron Rev.J 17nm),
2x8GB 3866/1933 15.21.20.32.60.tRFC 448 1T 1.590V Kingston HX436C17FB3K2/16 3600C17 1.35V (Hynix DJR 17nm)

Last edited by Nighthog; 06-22-2020 at 04:50 AM.
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post #3683 of 3699 (permalink) Old 06-22-2020, 04:59 AM
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Thank you for your answer,

Yes I understand what you mean by additional Fan for VRM heatsink. I just said that this big CPU cooler I have can provide some airflow, but that airflow is insufficient. I think that underneath my CPU cooler there is no room for additional VRM Fan. I will wait for reviews and then decide.

How efficient was your setup with that Fan over VRM heatsink ? Was temperature drop significant ?
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post #3684 of 3699 (permalink) Old 06-22-2020, 05:11 AM - Thread Starter
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Quote: Originally Posted by Tryas90 View Post
Thank you for your answer,

Yes I understand what you mean by additional Fan for VRM heatsink. I just said that this big CPU cooler I have can provide some airflow, but that airflow is insufficient. I think that underneath my CPU cooler there is no room for additional VRM Fan. I will wait for reviews and then decide.

How efficient was your setup with that Fan over VRM heatsink ? Was temperature drop significant ?
I would not have been able to OC my Ryzen 1700 on that board at all without it. Maybe something 3.8-3.9Ghz would have worked with a low voltage. I just wanted 4.0Ghz and pushed my voltage to ridiculous on that board. It's not meant to push more than 100-120Watts generally.

The 10+3 4C06/4C10N [1x1] I would rate 110-140Watts in comparison. With regard to the bigger heatsinks. In general it would be easier to keep in check.

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 18.27.24.48.90.tRFC 680 1T 1.650V [Micron Rev.J]
4x8GB 3800/1900 13.23.17.30.66.tRFC 600 1T 1.700V Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron Rev.E 19nm [D9VPP]),
2x8GB Kingston HX436C17FB3K2/16 3600C17 1.35V (Micron Rev.J 17nm),
2x8GB 3866/1933 15.21.20.32.60.tRFC 448 1T 1.590V Kingston HX436C17FB3K2/16 3600C17 1.35V (Hynix DJR 17nm)

Last edited by Nighthog; 06-22-2020 at 05:20 AM.
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post #3685 of 3699 (permalink) Old 06-22-2020, 05:37 AM - Thread Starter
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I would like to compare the B550M Pro to the X570 GAMING X 12-phase[10+2]


This video should be good enough, the "better" X570 of same components, reached 86C with a 3900X for VRM.

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 18.27.24.48.90.tRFC 680 1T 1.650V [Micron Rev.J]
4x8GB 3800/1900 13.23.17.30.66.tRFC 600 1T 1.700V Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron Rev.E 19nm [D9VPP]),
2x8GB Kingston HX436C17FB3K2/16 3600C17 1.35V (Micron Rev.J 17nm),
2x8GB 3866/1933 15.21.20.32.60.tRFC 448 1T 1.590V Kingston HX436C17FB3K2/16 3600C17 1.35V (Hynix DJR 17nm)
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post #3686 of 3699 (permalink) Old 06-22-2020, 11:49 AM
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Thank you for your tips.

It looks like I am going with Elite, hope it will last long.
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post #3687 of 3699 (permalink) Old 06-23-2020, 06:55 AM
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B550 Support

1700,2700x,2400G,3400G !



https://www.chiphell.com/forum.php?m...ad&tid=2232160
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post #3688 of 3699 (permalink) Old 06-23-2020, 07:07 AM - Thread Starter
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They can boot but you can't change anything in BIOS with the unsupported processors. At least on the ASRock board with that BIOS version.
This will be pretty much up to the board makers if they will allow it or not, Just "unsupported" but might work or not.

X570 as far as I know could boot with Ryzen 1000 series even if not explicitly supported. Depended on the AGESA version if they could do it.

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 18.27.24.48.90.tRFC 680 1T 1.650V [Micron Rev.J]
4x8GB 3800/1900 13.23.17.30.66.tRFC 600 1T 1.700V Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron Rev.E 19nm [D9VPP]),
2x8GB Kingston HX436C17FB3K2/16 3600C17 1.35V (Micron Rev.J 17nm),
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post #3689 of 3699 (permalink) Old 06-24-2020, 08:03 AM - Thread Starter
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Some 320A boards, to bad he never takes a good picture of the parts, all a blur.

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 18.27.24.48.90.tRFC 680 1T 1.650V [Micron Rev.J]
4x8GB 3800/1900 13.23.17.30.66.tRFC 600 1T 1.700V Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron Rev.E 19nm [D9VPP]),
2x8GB Kingston HX436C17FB3K2/16 3600C17 1.35V (Micron Rev.J 17nm),
2x8GB 3866/1933 15.21.20.32.60.tRFC 448 1T 1.590V Kingston HX436C17FB3K2/16 3600C17 1.35V (Hynix DJR 17nm)
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post #3690 of 3699 (permalink) Old 06-29-2020, 07:07 AM
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https://www.asus.com.cn/Motherboards...RO-S/overview/
new b450m from asus

upgrades over b450m pro gaming
1. m.2 heatsink for the pcie2.0x4 m.2 slot only, but not the pcie3.0x4 directly from cpu.
2. more USB on back i/o
3. realtek 8125B 2.5g lan
4. 8 drmos power stages (H+L+D) instead of 4 power stages (8H+8L+4drivers only)
5. 2oz copper for better pcb cooling of mosfets
6. one more fan headers, total 4 headers (2 is suck, 3 is minimum, 4 is average)
7. bios flashback button
8. 10a solid pin (procool I with no metal shroud)
9. 32mb bios

==>probably the strongest vrm on b450
this heatsink is proved to be good enough even handling 300w on tuf z490 on greentechreview


"downgrade"
m.2 pcie3.0x2-->pcie2.0x4, however same pcie2.0x4 between chipset and cpus

and still no 5v argb 3pin header

Last edited by asdkj1740; 06-29-2020 at 09:12 AM.
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