there where many problems with multi Rail PSU, they may trigger a Rail at Current Peaks.
it is risky, but what not in life.
MZ73-LM2 Rev 3, Dual Epyc 9684X, Dual 5090 RTX, relatively small footprint
- Thread starter Venturi
- Start date
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it is risky, but what not in life.
This PSU has no 6 pin cables for 4,5,6.
Can we use VGA cables which start with 8pins ports on PSU and end with 6 on M/B?
On my other rig with MZ73-LM0/Genoa + Corsair PSU the 8 pin PSU start - 6pin M/B end were cables marked as PCI cables and that worked perfectly.
Are really all these 8pin ports on PSU any different ?
From the people on the net :
Q: Can I use a VGA cable for PCIe? are the vga cables the same thing as pci-e cables
A: Yes use them they are the same thing
From the AI:
AI Overview
No, a VGA cable is not a PCI power cable. You cannot use a cable designed for video output to power a PCI-e graphics card, as they serve different purposes and have different connectors. You should use the proper 6-pin or 8-pin (6+2 pin) PCI-e power cables that are specifically designed for graphics cards, as using the wrong cable can damage your components or cause a fire
Can we use VGA cables which start with 8pins ports on PSU and end with 6 on M/B?
On my other rig with MZ73-LM0/Genoa + Corsair PSU the 8 pin PSU start - 6pin M/B end were cables marked as PCI cables and that worked perfectly.
Are really all these 8pin ports on PSU any different ?
From the people on the net :
Q: Can I use a VGA cable for PCIe? are the vga cables the same thing as pci-e cables
A: Yes use them they are the same thing
From the AI:
AI Overview
No, a VGA cable is not a PCI power cable. You cannot use a cable designed for video output to power a PCI-e graphics card, as they serve different purposes and have different connectors. You should use the proper 6-pin or 8-pin (6+2 pin) PCI-e power cables that are specifically designed for graphics cards, as using the wrong cable can damage your components or cause a fire
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Venturi, can you confirm that they have not provided PCIe cables ? I'm still guessing what cables fit and what not...90% of this PSU cables are not needed with this board, and what needed is missing. Things are that in the entire freaking Amazon I can not find these damn 6pin PCIe cables. Got only 1 same day delivery, and short one, while needed 3.
So my question again is, may be somebody knows
if instead of 6pin to 6pin PCIe cables I will use 8pin to 6+2pin VGA cables just not using these two extra lose pins at the cable end WILL THIS BE 100% LEGIT substitution? Looks like it worked before, but now I started to doubt
So my question again is, may be somebody knows
if instead of 6pin to 6pin PCIe cables I will use 8pin to 6+2pin VGA cables just not using these two extra lose pins at the cable end WILL THIS BE 100% LEGIT substitution? Looks like it worked before, but now I started to doubt
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Since power consumption will grow and grow, these constructs better to place into spacious metallic box to contain spread of flames and keep somewhere in garage. They also produce hell of noise and heat.
Plus first few months the room where they are working smells like a chemical plant. I do not know was it motherboard or memory making such poisonous fumes but I can not stand close more than few hours even 2 years after the purchase. Keeping it in a separate ventilated room and connect via optical cable. Probably that was Samsung memory (manufactured in Vietnam), because this new MZ73 does not smell.
Plus first few months the room where they are working smells like a chemical plant. I do not know was it motherboard or memory making such poisonous fumes but I can not stand close more than few hours even 2 years after the purchase. Keeping it in a separate ventilated room and connect via optical cable. Probably that was Samsung memory (manufactured in Vietnam), because this new MZ73 does not smell.
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You are not losing your mind, ... me on the other hand is questionable.
Actually, I bought 2 of the 2800w SF. Both came with all the cables, I am not missing any. However, the 6 pin that were included were for sata etc.
I was incorrect in the earlier post, my apologies, I hooked up 8 pin to 4 pin for the three x 6 pin on the board. My mind reverted to a prior board.
So hook up 8 pin to the 6 pin and fold back zip tie the 2 pin onto the strand.
So yes, LEGIT
Revised: (I cannot exist on a diet of crow alone)
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Good news. All works.
Bad news. It works like sh.!.t.
With one processor I was getting speedup 2.8 times versus 64core Genoa.
Then I added second processor, started getting crashes due to over-currents, changed power supply and ran my test again with two chips.
It became slower! Bad scalability. Now I do not know if to test further or return all that back, I have no free time to play with all this anymore
Do not have idea if this is due to bad test I use or bad second processor or bad motherboard or bad anything.
If anyone can suggest any easy Linux tests I will try to run.
Many thanks to all and first of all the thread author for the great help, fruitful discussions and very useful suggestions.
Bad news. It works like sh.!.t.
With one processor I was getting speedup 2.8 times versus 64core Genoa.
Then I added second processor, started getting crashes due to over-currents, changed power supply and ran my test again with two chips.
It became slower! Bad scalability. Now I do not know if to test further or return all that back, I have no free time to play with all this anymore
Do not have idea if this is due to bad test I use or bad second processor or bad motherboard or bad anything.
If anyone can suggest any easy Linux tests I will try to run.
Many thanks to all and first of all the thread author for the great help, fruitful discussions and very useful suggestions.
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First
start with processor seating. Take it. them off, check pins, use a can of air (hold the straw in case it blows off into the pins) wipe processor contacts with pure rubbing alcohol and wipe dry. swap processor locations, make sure they are orientated correctly, install both processors, and while your at it check ram seating, apply TIM, and screw down in a start pattern alternating pressure points 2 turns at at a time. When screwed completely down, back them all off 1/2 turn.
Second
Reflash bios from BMC
Put bios settings back in, you may emulate the settings I have posted if you feel comfortable, use a vga cable into board to be able to see initial posts, configure bios.
I would suggest bios - R12-F37 unless there is a specific reason you need the other bioses.
start with processor seating. Take it. them off, check pins, use a can of air (hold the straw in case it blows off into the pins) wipe processor contacts with pure rubbing alcohol and wipe dry. swap processor locations, make sure they are orientated correctly, install both processors, and while your at it check ram seating, apply TIM, and screw down in a start pattern alternating pressure points 2 turns at at a time. When screwed completely down, back them all off 1/2 turn.
Second
Reflash bios from BMC
Put bios settings back in, you may emulate the settings I have posted if you feel comfortable, use a vga cable into board to be able to see initial posts, configure bios.
I would suggest bios - R12-F37 unless there is a specific reason you need the other bioses.
But isn't R12_F37 pre-Turin? What were differences when changing BIOSes? Percents, tens percents, times? By the way noticed that BIOSes in Gigabyte site are all lacking one essential file so that everyone not with the knowledge of this dirty trick will fail. Several people reported that.
Also, do you think this PSU outlet also possible to use for GPU?
I will shuffle memory, processors, clean them one more time and will probably ask for change to another pair of processors. Processor threads are shown as running in the System monitor but the more threads i use the slower run is. Fastest run is with just one processor
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if you have used up all the other connectors, yes, you can use the outlet for GPU
. And while the R12-F37 does support turin, but since you're troubleshooting, go ahead and BMC update the bios.or reflash with R20-F41
Also, I am curious, like RolloZ170, what you are referring to by " noticed that BIOSes in Gigabyte site are all lacking one essential file so that everyone not with the knowledge of this dirty trick will fail. "
I'm only aware of the RBU
. And while the R12-F37 does support turin, but since you're troubleshooting, go ahead and BMC update the bios.or reflash with R20-F41
Also, I am curious, like RolloZ170, what you are referring to by " noticed that BIOSes in Gigabyte site are all lacking one essential file so that everyone not with the knowledge of this dirty trick will fail. "
I'm only aware of the RBU
Thanks for suggestions.
I got couple more days to play with this damn problem. Will change last time everything including Linux distro and see.
I installed BIOS on the other MZ73 only with the help of Gigabyte. BMC was not responsive no matter how much time and methods were used. Lost couple weeks on that effing problem thinking my MZ73-LM0 will be accepting Turins, which ended up negatively, Gigabyte does not support using Turins on that LM0 revision (and probably this is reasonable decision because Turins are power monsters way beyond the specification). Though one guy claimed that he installed Turins on LM0 Rev2, but then when asked for confirmations he disappeared.
And during the installation of this latest BIOS last month from the Terminal mode Gigabyte support found that one file there was missing. Fun is that the same problem reported other people for different BIOSes.
Questions: I tried to install regular legit Windows on LM0 and now on LM2. Failed twice. All starts OK but then freezes with blue screen. Succeeded only installing it on different consumer computer and then physically moving the NVMe drive to MZ73. What the heck with it? It is not on compatibility list but that should be my problem not the MZ73. Do you run Window natively and is your Windows a server version?
Do you think the pins on this motherboard and processor safely cleanable with anything besides the air stream? Have you done this yourself ? By the way I use hand blower for that which work same or even better than pressed air containers. Often the dirt on the pins is very hard to see, need to search for it at very shallow grazing angles like this:
I got couple more days to play with this damn problem. Will change last time everything including Linux distro and see.
I installed BIOS on the other MZ73 only with the help of Gigabyte. BMC was not responsive no matter how much time and methods were used. Lost couple weeks on that effing problem thinking my MZ73-LM0 will be accepting Turins, which ended up negatively, Gigabyte does not support using Turins on that LM0 revision (and probably this is reasonable decision because Turins are power monsters way beyond the specification). Though one guy claimed that he installed Turins on LM0 Rev2, but then when asked for confirmations he disappeared.
And during the installation of this latest BIOS last month from the Terminal mode Gigabyte support found that one file there was missing. Fun is that the same problem reported other people for different BIOSes.
Questions: I tried to install regular legit Windows on LM0 and now on LM2. Failed twice. All starts OK but then freezes with blue screen. Succeeded only installing it on different consumer computer and then physically moving the NVMe drive to MZ73. What the heck with it? It is not on compatibility list but that should be my problem not the MZ73. Do you run Window natively and is your Windows a server version?
Do you think the pins on this motherboard and processor safely cleanable with anything besides the air stream? Have you done this yourself ? By the way I use hand blower for that which work same or even better than pressed air containers. Often the dirt on the pins is very hard to see, need to search for it at very shallow grazing angles like this:
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The only thing you can clean the pins with is a can of air, and don’t be any closer than a 30cm
the CPUs can be cleaned with pure alcohol and dry them and then vigorously blow with air .
the underside, base side of CPUs should look factory new, clean without any surface imperfections, stain or pitting, an no cpu central
electronics disturbed or have any TPM near them
Using a side ways source of light, make sure motherboard cpu pins are all aligned in the same directions as the patterns
are the processors identical?
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No pure alcohol in US. Isopropyl 91% and even 99.9% I afraid to use though.
Processors are identical, same stepping
which file again ?
(btw: asrock rack has only the BIOS bin in the package, nothing else,
at supermicro you can't flash BIOS without working BMC....)