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VRM on the new AM4 motherboards

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post #191 of 3625 (permalink) Old 03-14-2017, 08:20 AM - Thread Starter
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Ok took a while. Removing old hardware was troublesome as the motherboard spacers/stands didn't want to unscrew themselves properly. Just spinning in place.

There were other trouble with PSU, fan was hitting something. Removed the fan guard seemed to fix that.

But at last I could boot without issues. Entered bios and all seemed well.

F4 Bios on this one. Did a quick test with the X.M.P profile and it loaded the memory settings without issue for now. No hard drive or OS on the system yet.

Ryzen 7 1700 with Wraith Spire cooler
Gigabyte Ga-AB350-Gaming 3
Corsair 2x8Gb 2666C16 1.2v memory. (CMK16GX4M2A2666C16R ver 5.30)
ATi 5450 512Mb.

And various spare junk parts to house and power it.
Pioneer DVD drive
A Old Cooler Mater Centurion 5 ATX case and some junk PSU 500Watt Q-tec, didn't want to use the other one that was even junkier.
12V line was only like 150watts on the other one.

This for a quick system test.. Took 4hours.

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X 4.4Ghz, 4266/1900 MEM/FCLK, 16.26.19.45.76.tRFC 650 1T 1.600V
4x8Gb Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron E-die 16nm)
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post #192 of 3625 (permalink) Old 03-14-2017, 10:24 AM
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Not to derail this thread, but I have searched and cannot seem to find a definitive answer yet. How does the ASUS X370 Prime Pro look VRM wise? Does it use the same components as the C6 Hero but less # of phases?

I can certainly take photos if they are needed once it comes in, never fun waiting for a newegg shipment. lol

Thanks for the assistance.
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post #193 of 3625 (permalink) Old 03-14-2017, 10:47 AM
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Got it in here, for photos klick the "B1" link in the "Quelle(n)" column.
The controller is the same as the one on the CH6 but it's operating in 6+2 mode instead of 4+2.
ASUS is using six independent IR drivers for the CPU VCC on this board so there are six true phases with the same NexFETs as on the CH6. No doubling.
A very interesting design I'd say.
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post #194 of 3625 (permalink) Old 03-14-2017, 11:53 AM - Thread Starter
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Ok, made the rebuild with main computer parts.

Just swapped in the hard drives, gpu + PSU.

You know it it's tricky to take out a full custom watercooling loop from a case without draining the system and taking it out intact to get at some parts.

Windows10 finds my new system fine (no reinstall, just straight transfer) and driver cd was handy for lan drivers smile.gif

Ryzen 7 1700
GA-AB350-Gaming 3
Corsair LPX 2x8Gb 2666C16
XFX RX 480 RS 4Gb

Corsair HX620 PSU

Cruxial MX300 525Gb
3x old hardrives 7200rpm
Pioneer dvd-rw drive.

My watercooling will be installed as soon as I get my AM4 adapter.

CPU-Z:
http://valid.x86.fr/raz6ir

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X 4.4Ghz, 4266/1900 MEM/FCLK, 16.26.19.45.76.tRFC 650 1T 1.600V
4x8Gb Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron E-die 16nm)
OLD: Biostar x470GT8 Ryzen 7 1700 @ ~4.0Ghz CPU, 3200Mhz RAM ...
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post #195 of 3625 (permalink) Old 03-14-2017, 12:25 PM
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Originally Posted by br0da View Post

Got it in here, for photos klick the "B1" link in the "Quelle(n)" column.
The controller is the same as the one on the CH6 but it's operating in 6+2 mode instead of 4+2.
ASUS is using six independent IR drivers for the CPU VCC on this board so there are six true phases with the same NexFETs as on the CH6. No doubling.
A very interesting design I'd say.

Awesome thanks for that info... it looks like I most likely won't have to replace the board then, that should work great. It lacks some features but I do not see myself missing most of them. Maybe the second m.2 slot... lol

Thanks again for the quick reply and for helping me out.
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post #196 of 3625 (permalink) Old 03-14-2017, 02:26 PM
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Quote:
Originally Posted by br0da View Post

Got it in here, for photos klick the "B1" link in the "Quelle(n)" column.
The controller is the same as the one on the CH6 but it's operating in 6+2 mode instead of 4+2.
ASUS is using six independent IR drivers for the CPU VCC on this board so there are six true phases with the same NexFETs as on the CH6. No doubling.
A very interesting design I'd say.

nice post

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post #197 of 3625 (permalink) Old 03-14-2017, 02:50 PM - Thread Starter
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A neat feature is the 6 temp sensors in various spots on this board. Though I've yet to find software to see them but inside the BIOS.

VRM was ~37C when I first booted and cpu 33C~idling.

I've yet to see any stability issues. My windows sadly needs to be reactivated, windows servers seem down so can't do it right now.

I ran some Memtest in windows and they went through 1 round of all memory without errors, my Corsair LPX 2666C16 works like a charm.
It's late today and this has taken a toll and I'm really tired.

EDIT:
Found gigabyte app that shows the temps

Running some Prime95 blend or smallFFT, VRM reach 60C+
3200Mhz ~1.1volt (all auto settings, not under load 1 cpu constanly boosts 3750Mhz with 1.380volts, so voltage goes down under load...)

Gigabyte X570 AORUS XTREME, Ryzen 7 3800X 4.4Ghz, 4266/1900 MEM/FCLK, 16.26.19.45.76.tRFC 650 1T 1.600V
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post #198 of 3625 (permalink) Old 03-14-2017, 03:14 PM
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Originally Posted by chew* View Post

I called it on review day. Boards will matter.

Now the big question can we get an extremely well built PWM on a no fluff No crazy bugs board with good bios support at an affordable cost with some usefull OC features for those that want to fool around on hwbot moments. biggrin.gif

^ This is all I want to know right now.
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Warning: Spoiler! (Click to show)
http://www.clubedohardware.com.br/artigos/placas-mae/placa-m%C3%A3e-gigabyte-ab350-gaming-3-r36672/?nbcpage=5
Gigabyte AB350-Gaming 3 = On Semi 4C10N + 4C06N driven by ISL 95712 PWM controller

So for the layman...is that good or bad?
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post #199 of 3625 (permalink) Old 03-14-2017, 04:10 PM
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Originally Posted by bardacuda View Post

^ This is all I want to know right now.
So for the layman...is that good or bad?

Depends on how high you want to overclock and with what voltage. It probably isn't going to help much as far as overclocking past 3.8GHz goes: Nighthog states that the VRM hits 60°C+ even when at 1.380V boost. I'm not sure if that is improper LLC (load line calibration settings) since they are experiencing V_droop (aka. voltage drop) under load and have everything auto.

4 phase with 25A-30A continuous VRM parts = at the limit for 100A that 4GHz normally requires however the board appears to band-aid this by running two 4C06N lowside per phase instead of one. I've seen 65°C VRM temperature listed for a MSI Tomahawk @1.36 V.

Ideally you'd want 6+ decent phases (i.e. 40A+ PowIRstage or 40A NexFET) for the CPU like the ASUS X370 Prime Pro (midrange) if not doubled up like the Asrock Fatal1ty K4 which had similar issues with 60°C VRM (not terrible but getting hot) under overclocks. If only the ASUS X370 Prime Pro board had OC-ing features such as clear CMOS + better memory support (and memory phases).

Split between 4 phases = on 25% of the time
Split between 6 phases = on 16.7% of the time
It's a difference of phases turning on an extra 7-8% of the time.

Cheap boards are running 3+3 doubled to 6+3 , or 4+3 with LowRDs(on) mosfets such as those from OnSemi's , Sinopower , or NIKOS. Midrange are doing 6+4 with decent phases (Gigabyte Gaming 5/ ASUS Prime Pro) or doubling up cheaper mosfets (X370 Fatal1ty K4 / Killer SLI). Higher end OCing boards such as CH VI Hero , Biostar X370GT7, or Fatal1ty Professional are running 4+2 or 6+2 decent phases (NexFETs) doubled to 8+4 or 12+4.

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post #200 of 3625 (permalink) Old 03-15-2017, 02:28 AM - Thread Starter
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Seems the VRM will need some serious help if you want to OC on this board. Passive temps aren't great at all loading up all 16threads in Prime95.

Currently running 3500Mhz (+0.000v offset = 1.176~1.188 cpu-z) and VRM are at 76...77... suddenly increasing (was 72C a moment ago) 78... small FFT.

Active cooling directed seems recommended.

79C degrees.

...

80C hit now on VRM MOS and 70C on CPU

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