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amperage requirements?


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Hi,

I had a scan of the manual for the motherboard - it did not provide the amperage for each voltage on the 24 pin socket. In this instance - i think a support request with MSI is required.

 

In addition - could not see the specified power supply power rating either - i usually purchase 500W PSU since it will cope with any future graphics card(s) i put into the machine.

 

Regards,

Shadders.

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The CPU and GPU draw the most power and each chip has an idle and full load power draw.

 

ATX provide max 8A for each pin.

 

400W supply is reasonably ok without a high powered GPU etc. If you want to go lower you need to factor in all the parts plugged in.

 

Custom room treatments for headphone users.

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1 hour ago, the_doc735 said:

I have the MSI Z370i GAMING PRO CARBON AC mini-ITX mobo.

 

Does anyone know the maximum amperage on the ATX 24 pin socket for:
 
3.3v, max. amps?
 
5v, max. amps?
 
12v, max. amps?


 ........power/rails please?

 

Also the amperage for the 8 PIN 12v CPU socket?

 

Many thanks! 

What are you actually asking here? MSI can tell you what the max available current is for the local DC>DC regulators, but much of this is determined by what is socketed in your machine and what the CPU and RAM voltages are. This is not a simple question as I see it, and yet another example of you being in over your head. Just buy a streamer and be done with it or leave well enough alone until you fully understand. IMO, you really need to do some of your own research...

Forrest:

Win10 i9 9900KS/GTX1060 HQPlayer4>Win10 NAA

DSD>Pavel's DSC2.6>Bent Audio TAP>

Parasound JC1>"Naked" Quad ESL63/Tannoy PS350B subs<100Hz

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11 hours ago, marce said:

Depends whats plugged in...

MY HTPC:

 

MSI Z370i GAMING PRO CARBON AC mini-ITX + Intel® HD Integrated Graphics 630.

Intel Core i7 Coffee Lake 8700 SE Gen.8 2.9GHz LGA1151 TDP 35W CPU.

Pink Faun i2s Bridge PCI-e (expansion/riser) Card.

Samsung (only 250GB) 960 M.2 (2280) Evo PCIe 3.0 (x4) NVMe 3D V-NAND SSD MZ-V6E250BW (x1).

Patriot Viper 4 16GB Dual Ch. DDR4 3000MHz PC4-24000 DIMM PV416G300C6K.

Streacom st-fc9b-opt-alpha PC Fanless Chassis. 

 

...is this what you meant please?

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11 hours ago, jabbr said:

The CPU and GPU draw the most power and each chip has an idle and full load power draw.

 

ATX provide max 8A for each pin.

 

400W supply is reasonably ok without a high powered GPU etc. If you want to go lower you need to factor in all the parts plugged in.

 

MY HTPC:

 

MSI Z370i GAMING PRO CARBON AC mini-ITX + Intel® HD Integrated/embedded Graphics 630.

Intel Core i7 Coffee Lake 8700 SE Gen.8 2.9GHz LGA1151 TDP 35W CPU.

Pink Faun i2s Bridge PCI-e (expansion/riser) Card.

Samsung (only 250GB) 960 M.2 (2280) Evo PCIe 3.0 (x4) NVMe 3D V-NAND SSD MZ-V6E250BW (x1).

Patriot Viper 4 16GB Dual Ch. DDR4 3000MHz PC4-24000 DIMM PV416G300C6K.

Streacom st-fc9b-opt-alpha PC Fanless Chassis. 

 

...is this what you meant please? 

 

 

I'm OK with GPU as I use the intel 630 embedded device because this PC is for audio/music only so I don't need the discreet GPU's. 

Peak wattage at boot up is 63W, then falls back to idle at 33W in total.

Currently using Seasonic Prime Ultra ’80+’ Titanium 650 Watt ATX M-PSU. But I want to try LPSU (s) without pico.

 
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1 hour ago, 4est said:

What are you actually asking here? MSI can tell you what the max available current is for the local DC>DC regulators, but much of this is determined by what is socketed in your machine and what the CPU and RAM voltages are.

many thanks,

 I think to do a support request for this kind of information you need to register your product with MSI as having been purchased from new? e.g. what retailer did you buy from? Unfortunately mine is secondhand (used)! So, that support wouldn't be available to me? The manual says nothing about amps either.

I think I could get the CPU & RAM voltage from the bios or something like speccy.

 

MY HTPC:

MSI Z370i GAMING PRO CARBON AC mini-ITX + Intel® HD Integrated/embedded Graphics 630.

Intel Core i7 Coffee Lake 8700 SE Gen.8 2.9GHz LGA1151 TDP 35W CPU.

Pink Faun i2s Bridge PCI-e (expansion/riser) Card.

Samsung (only 250GB) 960 M.2 (2280) Evo PCIe 3.0 (x4) NVMe 3D V-NAND SSD MZ-V6E250BW (x1).

Patriot Viper 4 16GB Dual Ch. DDR4 3000MHz PC4-24000 DIMM PV416G300C6K.

Streacom st-fc9b-opt-alpha PC Fanless Chassis. 

 

I'm OK with GPU as I use the intel 630 embedded device because this PC is for audio/music only so I don't need the discreet GPU's. 

Peak wattage at boot up is 63W, then falls back to idle at 33W in total.

Currently using Seasonic Prime Ultra ’80+’ Titanium 650 Watt ATX M-PSU. But I want to try LPSU (s) without pico.

Like this: see pics,

2051061439_ArebuiltSinglePC3.thumb.jpg.0a2ac799704a5f269ad9c7d38b952727.jpg

329702164_ArebuiltSinglePC4.thumb.jpg.22430c403b519b4f1e3d120bb7e15cc9.jpg

 

Can I politely ask you to refrain from giving your personal opinion please regarding my character as this has caused enough trouble already. Thank you!

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8 minutes ago, jabbr said:

You should be able to use a 160W ATX supply then.

my PC has a maximum wattage of 63 W at boot up, i.e. that is the peak! ...then it settles back to around 33W when idle (no apps on!).
The HDPlex LPSU is rated at 200W so that should be fine, i.e. plenty of headroom overall.
However, in a certain TOMS HARDWARE quote it states that the usual requirement is: 2.0–4.0 amps  on the +5 V, rail.
So, when I adjust the variable  rail to 5v the requirement could be 2-4A !! (on that rail). The others look fine to me! However the HDPlex has a max. of 2 amps on that specific rail and may not be sufficient? Larry at HDPlex has offered me 12v + 12v at 10 amps each and 2 variable rails for the 3.3 & 5v respectively at a maximum of 2 amps each! He doesn't think it will work based on the TOMS HARDWARE quoted 'usual' requirements!
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28 minutes ago, the_doc735 said:

Larry at HDPlex has offered me 12v + 12v at 10 amps each and 2 variable rails for the 3.3 & 5v respectively at a maximum of 2 amps each! He doesn't think it will work based on the TOMS HARDWARE quoted 'usual' requirements!

 

If the manufacturer doesn't think it will work, then you need another option. You could measure the 5V current with an ammeter, or find out what your M.2 drive and PCIe card draw.

Custom room treatments for headphone users.

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41 minutes ago, jabbr said:

 

If the manufacturer doesn't think it will work, then you need another option. You could measure the 5V current with an ammeter, or find out what your M.2 drive and PCIe card draw.

I've ordered a mini clamp meter. Might be here next week sometime. Then I can see what all four rails are drawing (allowing for a margin of inaccuracy). Larry said: "let me know the results when you have them".

Cheers!

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6 hours ago, jabbr said:

 

You could measure the 5V current with an ammeter,

Unfortunately the range on my pocket meter is only 0 to 200 mA (DC only/no AC) i.e not 2 - 10Amps. But I am getting an AC/DC clamp meter with a range up to 200A.

I also put the question on the MSI forum and as I suspected; no response (so far). As I explained earlier I can't use MSI support question service because I purchased it secondhand and that is only for retail purchasers (brand new).

Thanks for your input!

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On 10/5/2018 at 9:11 AM, the_doc735 said:

I will post the test results 'here' to help anyone else looking for this information. Stay tuned next week sometime! And thanks to all that have contributed so far!

Right, the peak at boot up time, with the clamp set to 2A/DC I get: (display count 2000)

3.3v /0.190

5v /0.550

12v /0.240

 

...so what does all this mean? e.g. 0.550 = half an amp?

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14 minutes ago, Shadders said:

Hi,

Yes - if the range of the clamp was upto 2amps, then 0.55 will be just over half an amp.

Regards,

Shadders.

hi shadders,

just got a reply from Larry and he said: "I don't think so. 12V boot peak would at least be 1-1.5A. This seems too low."?

 

Could I be setting the clamp up wrongly? It's a UNI-T UT210E

s-l1600.jpg

 

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3 minutes ago, the_doc735 said:

hi shadders,

just got a reply from Larry and he said: "I don't think so. 12V boot peak would at least be 1-1.5A. This seems too low."?

 

Could I be setting the clamp up wrongly? It's a UNI-T UT210E

 

 

Hi,

Yes - at boot time - any surges will be greater than the quiescent condition. Yet, for the scale you are using, 0.55 is just a bit over half an amp.

 

So, what is happening is that the device is not measuring the peak surge current which happens at boot time of the PC. I checked the manual - it is not searchable - so could not determine if the "data hold" is peak value hold.

 

The frequency at which the device measures may so low (slow) that the peak occurs and subsides before the meter measures it, then you will not see the peak.

 

The unit is stated to be 2% accurate - so no issues there. You may want to run as many things on the PC as you would in a normal use situation to measure the current then. It will provide some indication of worst case.

 

Regards,

Shadders.

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23 minutes ago, Shadders said:

Hi,

Yes - at boot time - any surges will be greater than the quiescent condition. Yet, for the scale you are using, 0.55 is just a bit over half an amp.

 

So, what is happening is that the device is not measuring the peak surge current which happens at boot time of the PC. I checked the manual - it is not searchable - so could not determine if the "data hold" is peak value hold.

 

The frequency at which the device measures may so low (slow) that the peak occurs and subsides before the meter measures it, then you will not see the peak.

 

The unit is stated to be 2% accurate - so no issues there. You may want to run as many things on the PC as you would in a normal use situation to measure the current then. It will provide some indication of worst case.

 

Regards,

Shadders.

just discovered something!

in the manual it says: "place electric wire on geometric center indicated by clamp head". I didn't do that! I just placed the wire in the loop, does that make a difference? B.T.W. the hold is just manual, not peak.

many thanks"

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Just now, the_doc735 said:

just discovered something!

in the manual it says: "place electric wire on geometric center indicated by clamp head". I didn't do that! I just placed the wire in the loop, does that make a difference? B.T.W. the hold is just manual, not peak.

many thanks"

Hi,

Yes, the device is a hall effect device, and the design may require the wire to be in a specific place to ensure accuracy. If you follow the instructions, then you will obtain the accurate reading.

Regards,

Shadders.

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As I have found the user manual & online resources to be pretty vague & contradictory, I would just like to ask if anyone knows the precise positioning of the cable/wire being measured?

e.g.

wrapped around the + post

dead centre 

close behind the neg. post across and in front of the positive post

absolute bottom of loop

absolute top of loop

etc.

 

Cheers!

 

1305935588_UNI-TUT210E(1).thumb.jpg.f06566baf529d95b13b68c266241d05d.jpg

 

139256164_UNI-TUT210E(1b).thumb.jpg.674761193021e3b2f36914e9517f39cf.jpg

 

148873317_UNI-TUT210E(1c).thumb.jpg.be5abc522052babd35ed425304638e7e.jpg

 

1076627941_UNI-TUT210E(1d).thumb.jpg.2087d42686cb8fc0fb278440cced51a2.jpg

 

500261138_UNI-TUT210E(1e).thumb.jpg.f81335acf9b5bf828176a8241c670942.jpg

 

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10 hours ago, the_doc735 said:

As I have found the user manual & online resources to be pretty vague & contradictory, I would just like to ask if anyone knows the precise positioning of the cable/wire being measured?

e.g.

wrapped around the + post

dead centre 

close behind the neg. post across and in front of the positive post

absolute bottom of loop

absolute top of loop

etc.

 

Cheers!

 

1305935588_UNI-TUT210E(1).thumb.jpg.f06566baf529d95b13b68c266241d05d.jpg

 

139256164_UNI-TUT210E(1b).thumb.jpg.674761193021e3b2f36914e9517f39cf.jpg

 

148873317_UNI-TUT210E(1c).thumb.jpg.be5abc522052babd35ed425304638e7e.jpg

 

1076627941_UNI-TUT210E(1d).thumb.jpg.2087d42686cb8fc0fb278440cced51a2.jpg

 

500261138_UNI-TUT210E(1e).thumb.jpg.f81335acf9b5bf828176a8241c670942.jpg

 

Hi,

The manual on page 1 states "...place electric wire on geometric centre indicated by clamp head" for measuring AC/DC using figures 5 and 6.

 

Your last picture is the most applicable. The translation is a bit off - should be "...place electric wire on in geometric centre indicated by clamp head" . It is hard to present  3D picture on a 2D piece of paper.

 

Regards,

Shadders.

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