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X370 Killer SLI huge volt. drop, impossible to OC
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zlobster View Drop Down
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Joined: 02 Sep 2017
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Points: 403 		Post Options Post Options   Thanks (0) Thanks(0)   Quote zlobster Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2017 at 11:23pm
4GHz is definitely possible. One should be extremely intimate with all the sub-timings and voltages, though. Just because many have luck and hit 4GHz with a simple voltage bump doesn't guarantee everyone will.

Another option is BCLK OC, which is a thing on its own.

Also, few stable benchmarks and stress test mean zilch. When I was beginning to step into the world of OC, I was often eluded that my OC are stable. Often the OC crumbles badly over only a specific workload. To claim some OC to be perfectly stable one needs to put the PC under vigorous testing for at least a few months. All the rest are fairy tales.


Edited by zlobster - 29 Dec 2017 at 11:25pm
1700X ZP-B1 (stock); X370 Taichi (UEFI 3.10); 16GB F4-3200C14-8GFX XMP; 256GB 960 EVO; RX 580 NITRO+ 8GB
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datonyb View Drop Down
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Points: 3154 		Post Options Post Options   Thanks (0) Thanks(0)   Quote datonyb Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2017 at 11:08pm
the trouble is ..............

despite many claims of 4ghz stable overclocks, there are only a few

hitting 4ghz and booting windows and completing cinebench isnt a stable overclock
sitting at 4ghz for 24hrs of prime would be considered stable

not a lot of ryzens would be able to do this even on flagship boards

dont believe me ? go read the crosshair6 overclocking thread on overclockers..............

hitting 3.9 stable increases the odds by an extreme amount, also note the very high amount of people reporting such a massive increase in volts to get that extra 100mhz

personally i think in agreement that the lack of llc may be a big factor in your case,but if you havnt got the option, then you dont have that option
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adsaidler View Drop Down
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Points: 18 		Post Options Post Options   Thanks (0) Thanks(0)   Quote adsaidler Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2017 at 8:43pm
Petrol,

Exactly, if I had LLC options to keep the voltage under load as close as possible to the defined voltage, things would go way more smoothly.

I sent the guys a private message, and am hoping they take a look at this topic!
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PetrolHead View Drop Down
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Okay, so VRM temperatures should be okay as well. I have no personal experience pushing Ryzen's to their limit, but from what I've read and heard it may be that to get 4GHz you need a big jump to the Vcore compared to 3.9GHz. That's the Vcore wall I referred to previously; it can be easy to get to a certain point and a real pain trying to push the CPU any further. In any case having access to LLC settings would probably help.

Unfortunately I don't know of any other means to get in touch with ASRock. They do sometimes respond to threads in the forum, but if it's something that can be solved through forum advice, I think you'll have more luck getting help from the forum moderators (Parsec, wardog and Xaltar, I think). They give great advice, but can't of course help if the BIOS is missing some features you would need.
Ryzen 5 1500X, ASRock AB350M Pro4, 2x8 GB G.Skill Trident Z 3466CL16, Sapphire Pulse RX Vega56 8G HBM2, Corsair RM550x, Samsung 960 EVO SSD (NVMe) 250GB, Samsung 850 EVO SSD 500 GB, Windows 10 64-bit
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adsaidler View Drop Down
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Joined: 29 Dec 2017
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Points: 18 		Post Options Post Options   Thanks (0) Thanks(0)   Quote adsaidler Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2017 at 8:19pm
Originally posted by PetrolHead PetrolHead wrote:

Hmm. Your PSU should be a quality unit and unless you're running a multi-GPU setup it's totally overkill, so that should not cause any issues. With the VRM your motherboard has it doesn't feel like VRM temperatures should be a big issue even though the liquid cooler takes away the airflow it would receive with the stock cooler... It's also weird that BIOS overclocking would be so problematic and it sure sound like LLC is precisely the thing you would want here, assuming the CPU can do 4GHz stable in the first place. Maybe it could be worth it to contact ASRock's support directly, describe the issue and ask if they could include LLC in future BIOS updates. Just for the heck of it you could also try setting up a fan so that it cools the VRM, just to see if the extra cooling has a noticeable impact on the voltage droop.

Petrol, the PSU comes from my previous build, and is barely 1 year old, and I'm running a single 1070 now.

VRM average temps for the last hour is 84c.

I'm pretty sure it can do 4Ghz stable, since it's over an hour stress testing @ 3.9 1.38v, no problem.

I sent AsRock an email describing the issue. Do you know of any other means to get in touch with AsRock regarding this issue?

Does any AsRock technical personnel frequent this forum?

Thank you!!
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PetrolHead View Drop Down
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Points: 403 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PetrolHead Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2017 at 8:12pm
Hmm. Your PSU should be a quality unit and unless you're running a multi-GPU setup it's totally overkill, so that should not cause any issues. With the VRM your motherboard has it doesn't feel like VRM temperatures should be a big issue even though the liquid cooler takes away the airflow it would receive with the stock cooler... It's also weird that BIOS overclocking would be so problematic and it sure sound like LLC is precisely the thing you would want here, assuming the CPU can do 4GHz stable in the first place. Maybe it could be worth it to contact ASRock's support directly, describe the issue and ask if they could include LLC in future BIOS updates. Just for the heck of it you could also try setting up a fan so that it cools the VRM, just to see if the extra cooling has a noticeable impact on the voltage droop.
Ryzen 5 1500X, ASRock AB350M Pro4, 2x8 GB G.Skill Trident Z 3466CL16, Sapphire Pulse RX Vega56 8G HBM2, Corsair RM550x, Samsung 960 EVO SSD (NVMe) 250GB, Samsung 850 EVO SSD 500 GB, Windows 10 64-bit
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adsaidler View Drop Down
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Right now, I'm stress testing for 30 minutes the following: 3900Mhz, 1.45v @ Ryzen Master. HWINFOI informs an average CPU Core Voltage of 1.37v. If the stress test stops, it jumps right up to 1.45v at idle.
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adsaidler View Drop Down
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Originally posted by zlobster zlobster wrote:

Are you using the latest UEFI?

You may want to tweak the LLC as well.

zlobster, I'm using the latest UEFI. This motherboard's newer revison like the one I have does not have LLC options in the UEFI, unlike the first ones had.
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zlobster View Drop Down
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Are you using the latest UEFI?

You may want to tweak the LLC as well.
1700X ZP-B1 (stock); X370 Taichi (UEFI 3.10); 16GB F4-3200C14-8GFX XMP; 256GB 960 EVO; RX 580 NITRO+ 8GB
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adsaidler View Drop Down
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Thanks for the reply, PetrolHead!

I'm aware of the safe voltage for 24/7 usage, but an AMD representative disclosed a couple of months ago that 1.45v was the maximum voltage that should be used for more extreme overclocks.

This is not the issue thou. The issue is the voltage dropping absurdly when stress testing with AIDA.

As I said previously,  the voltage drops to an average of 1.378v as shown in HWINFO64, when it is set to 1.45v on Ryzen Master. 1.378 under load can keep 3.9Ghz stable.

BIOS OC is problematic for some reason, since it doesn't boot at 3800, 3900 or 4000 Mhz @ 1.45v, so I'm using Ryzen Master. Tried BIOS versions 2.5 and 3.4.


I'm using a Cooler Master V1000 80 Plus Gold power supply, a Cooler Master MasterLiquid 240 cooler, and temps fluctuate around 74c. 

RAM is Samsung b-die 3200mhz CL15. XMP profile is set to 3200mhz, no other settings are changed.






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