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MVG Digi+ Power Phase Control - can someone explain?

mjodlowski
Level 7
Guys,

First question - how does Digi+ Power Phase Control influence power drawn on 12V, 5V and 3.3V rails?

Question origin - I'm having an odd problem (=> longish explanation 😞 ) with my build (below).

Symptoms:
- One drive (HDD 3.5" or BD) - problem does not appear regardless of BIOS settings
- DIgi+ PPC auto/optimized => Q-Code 55 Memory not initialized at startup and resume from standby. Disappears after reset.
- Digi+ PPC Standard => all works fine.

Already checked memory, connections, re-seated CPU, etc. etc. - seems Digi+ Power Phase Control is somewhat problematic.

Possible cause (IMO):
- PSU defective?
- PSU with not enough amperage on low rails (I'm sure 12V should be enough - PSU has 3 12V rails and I use all: 1 - MB, 2 - B + 2.5" HDD + SSD, 3 - HDDs)?
- MB defective - too much power drawn from low rails?

Seems clearly there might be problem with 5V rail (12V uses separate rail for SATA and MB) as detaching BD or HDD solves problem.

Second question: could you advise what is your opinion on the build (especially if PSU has enough capacity).

Asus Maximus V Gene - BIOS 1309.
Modu87+ 500W Gold (important - 100W on 5V + 3,3V rails)
Intel i7-2600K stock 3.4GHz, overclocking to 3.8 does not change behavior
Akasa Apache 120mm Fan + Prolimatech Samuel 17
4x Samsung Green 30nm 1.35V (before 2x2GB OZC Platinum 1333MHz low voltage)
2xWD10EADS - 1TB Green HDD Western Digital
2x Scythe Kazu Jyu HDD fan
1xSSD Samsung 830 120GB
1xHDD 5400 RPM Hitachi
1xLite-On iHBS212 Blu-Ray RW.
3x Scythe Mini Kaze Ultra
Case: Moneual Moncaso 320 (If you ask - yes all those things fit inside 🙂 - simultaneously.
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12 REPLIES 12

HiVizMan
Level 40
Am I correct in noting you use the Intel on board graphics. If yes, then your PSU should be fine.

The easy answer is to buy a PSU tester, they cost $8 via Amozon or the Bay and if you get a digital version your question about rails being supplied correctly will be answered.

I will test your error 55 discovery out myself as I often get that error with certain memory and have not thought to do what you have.

To answer your questin 1. The Diggi + controls all the voltage regulators that access all the rails on your PSU so technically the Diggi VRM do by default and are controlling how much voltage is supplied to all parts on the motherboard.
To help us help you - please provide as much information about your system and the problem as possible.

feniks
Level 11
I would backprobe PSU voltage on running system at idle and under load from the 24-pin connector (MB) & 8-pin (ATX/EPS). my MB software (including BIOS) reports way too low volts at lower edge of acceptable range of ATX2.2 standard. after double checking with volt-meter it appeared perfectly fine slightly above mid-range on all volts (+12V, +5V, +3.3V).

55 memory code usually refers to memory alone, have you run memtest86+ 4.20 on it over night at rated settings (XMP) to see if it is fully stable? adjusting some of Digi+ settings might impact stability of cores/IMC and flakey IMC/RAM could be the first victim of such... just my 2 cents...

I stick to Extreme phase setting in Digi+ however on latest 1501 BIOS and no trouble. with former BIOSes (704, 1309, 1408) I had to use Optimized Phase and often 500KHz CPU Voltage Frequency for firm stability at clocks over 4.9GHz, no longer an issue in 1501 it seems.
.: R3C0NF1GUR3D :.
ASUS MVE :: 3770K bench @ 5.2GHz (delidded) :: 2x4GB Mushkin 996990 @ 2400MHz CL10 @ 1.7V :: evga 670 2GB SLI @ 1280/7108 :: Mushkin Chronos 240GB SSD RAID0 (OS) :: WD RE4 2TB (storage) 2TB :: Hitachi Deskstar 5K300 2TB (backup USB3.0) :: ASUS VG248QE 24'' 144Hz monitor

My rig with pictures
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle

Thanks guys for quick answer.

@HiVizMan
I use iGPU. I will try to check PSU with tester but no sure if this will help as I expect problems on loaded PSU and amperage capabilities of the PSU.

@Feniks
I tried two different memory kits - now running on 30nm samsung @stock speed and voltage c.a. 1.3v
I will try to check voltage - my cheap DMM always shows voltage over mid-range. BIOS readings are also fine. The problem is at startup as when I connect Blu ray afterwards nothing particular happens.

Waiting for Asus to check if this problem could be further investigated by them.

Marek

feniks
Level 11
Marek,

have you updated BIOS to the latest revision (e.g. 1501 for MVE)? Have you tried Loading BIOS Defaults (F5), save & reboot and then set Ai Mode from Auto to XMP and see if it works this way? have you tried setting all memory settings manually (DDR speed, DIMM voltage and Mem Timings)?
have you tried moving 2 sticks to other slots? e.g. both black, or both red or running one stick at a time in each of slots to test them out?

Until you sort out code 55 cause, you should not customize any BIOS options, just run the latest BIOS, CLeaR CMOS (press button on the back of MB), Load Defaults, Save & reset and then the only thing you change would be Ai Mode to XMP or Manual - it should work in either mode, fully automatic at rated speeds or manually at same settings.

code 55 means exactly "Memory Not installed" but it could be interpreted also as no compatible memory found for given memory settings.
Lastly it could also indicate a problem with CPU IMC or the MB itself (MB slots) ...
.: R3C0NF1GUR3D :.
ASUS MVE :: 3770K bench @ 5.2GHz (delidded) :: 2x4GB Mushkin 996990 @ 2400MHz CL10 @ 1.7V :: evga 670 2GB SLI @ 1280/7108 :: Mushkin Chronos 240GB SSD RAID0 (OS) :: WD RE4 2TB (storage) 2TB :: Hitachi Deskstar 5K300 2TB (backup USB3.0) :: ASUS VG248QE 24'' 144Hz monitor

My rig with pictures
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle

Guys,

For others too: Q-Code 55 in my setup was caused by defective Blu-Ray drive. It sucks very high current from either 5V or 12V power rails and apparently @cold boot my Enermax Modu87+ Gold 500W was not able to handle the load (but no OCP tought)

With smaller PSU MB was not even giving Power OK to PSU.

[OT] Any idea why Blu-Ray (Lite-On iHBS212-32) can drain > 3A from 12/5V ??? I checked with Molex AC/DC adapter rated 2A and blu-ray does not start at all. The strange thing is that the drive works just fine when it starts with Enermax.

Regards,
Marek

feniks
Level 11
not sure buddy, I use no Blue Ray drive here, just a plain old DVD-RW (which serves mostly as my intake radiator clamp LOL!) ... but fo sure when I run AIDA64 in background my system eventually shuts down and becomes unresponsive to the Power Button until I cycle the rocker switch on the PSU itself, then all works fine ... stopped using AIDA64 in background for now ... I cannot understand if this is a software issue (conflict with BIOS??) or simply AIDA64 somehow makes my Thermaltake Toughpower Grand 1050M PSU crap out and I should replace it .... hmmm... contacted Thermaltake, will see what they say.
.: R3C0NF1GUR3D :.
ASUS MVE :: 3770K bench @ 5.2GHz (delidded) :: 2x4GB Mushkin 996990 @ 2400MHz CL10 @ 1.7V :: evga 670 2GB SLI @ 1280/7108 :: Mushkin Chronos 240GB SSD RAID0 (OS) :: WD RE4 2TB (storage) 2TB :: Hitachi Deskstar 5K300 2TB (backup USB3.0) :: ASUS VG248QE 24'' 144Hz monitor

My rig with pictures
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle

mjodlowski
Level 7
I'm not even getting there - I suspect some electrical problem. PC is not even booting when BD is connected (BeQuite 430W PSU with Asus Z77 board and i5 - iGPU). BD is not connected with SATA cable...

Thx,
M.

TenBlade
Level 11
I diagnosed a faulty PSU with OCCT psu stress test. Free download, easy to use, produces graphs that show you what line is faulty.

TenBlade wrote:
I diagnosed a faulty PSU with OCCT psu stress test. Free download, easy to use, produces graphs that show you what line is faulty.


OCCT is an excellent tester for video cards and PSU stability. I don't use it for CPU stability, but its linpack test should suffice as well for this - I am just used to different tools (use linpack as a secondary measure to double check).

In fact I am about to test my PSU with it under load very soon to rule out problems with it.
.: R3C0NF1GUR3D :.
ASUS MVE :: 3770K bench @ 5.2GHz (delidded) :: 2x4GB Mushkin 996990 @ 2400MHz CL10 @ 1.7V :: evga 670 2GB SLI @ 1280/7108 :: Mushkin Chronos 240GB SSD RAID0 (OS) :: WD RE4 2TB (storage) 2TB :: Hitachi Deskstar 5K300 2TB (backup USB3.0) :: ASUS VG248QE 24'' 144Hz monitor

My rig with pictures
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle