PCIe 6-pin/8-pin from Supermicro CSE-846 power distribution board

[yaogen]

Hi guys, new to the forums.

I'm working to install 2x graphics cards in my Supermicro CSE-846 case.

Unfortunately the Power Distributor board (ABLECOM 03573-0100-16F) doesn't have any 6-pin / 8-pin PCIe connectors and I'm looking for any information/specifications that might lead me to be able to fabricate this myself. I've been searching for the better part of today without any luck.

I'd really like to get my hands on the specifications for that Power Distributor board as I believe I need to mod some addon to it, and if so then I need to know where to suitably hook in.

Any help greatly appreciated.

 

[NablaSquaredG]

Hi,

Can you please post a picture of the 846 case you have?
There are a couple of Supermicro PDB boards that might fit

 

[yaogen]

Hey,
Don't have any ready pictures of the case but I've attached a picture of the board in its place. Perhaps that could be useful?

 

[RolloZ170]

the PDB-PT846-8824 is the standard, and the PDB-PT846-2824 is the high power PDB of the CSE-846.
i took a look at my PDB-PT847-8824 and the +12V lines are not separated, they are compined to one rail.
you can put another 8 Pin to this solder points.

 

[NablaSquaredG]

If you don't want to solder, you try to fit a PDN-PT747-4648 in. I don't know whether it will fit without modifications, but it has 8 PCIe power connectors

 

[RolloZ170]

If you don't want to solder, you try to fit a PDN-PT747-4648 in. I don't know whether it will fit without modifications, but it has 8 PCIe power connectors

some 6/8 Pin are created by Y-Cables, but i expect more than 3 native cables.

PDB-PT747-4648

 

[yaogen]

the PDB-PT846-8824 is the standard, and the PDB-PT846-2824 is the high power PDB of the CSE-846.
i took a look at my PDB-PT847-8824 and the +12V lines are not separated, they are compined to one rail.
you can put another 8 Pin to this solder points.

Thanks ..
Interesting that it only carries 1 rail though. But maybe it helps as it makes it less important where to hook in the new cables
Seems like it's PDB-PT846-2824 that closest resembles the one I have (pic below) but it's hard to make out.

(from eBay)

If you don't want to solder, you try to fit a PDN-PT747-4648 in. I don't know whether it will fit without modifications, but it has 8 PCIe power connectors

Thanks .. and I have no problem modding the existing PDB.
Thing is, I'd like to find the specifications so that I know where I should hook in the new cabling.

some 6/8 Pin are created by Y-Cables, but i expect more than 3 native cables.
PDB-PT747-4648

Yeah, was looking at that too .. 2x ATX S-ATA AMP/Molex connector to 1x 6-pin or 8-pin PCIe. Unfortunately I only have 1x of those AMP/Molex:s available .. (need 4).

 

[RolloZ170]

Yeah, was looking at that too .. 2x ATX S-ATA AMP/Molex connector to 1x 6-pin or 8-pin PCIe. Unfortunately I only have 1x of those AMP/Molex:s available .. (need 4).

you misunderstood. that PDB- PT747 uses a Y-Cable at one 8 Pin to make more...
don't do that at home, at least NOT with molex. the outputs of molex can mostly not deliver many current.

 

[RolloZ170]

Thanks .. and I have no problem modding the existing PDB.
Thing is, I'd like to find the specifications so that I know where I should hook in the new cabling.

to the yellow of the existing 8 pin please.

 

[yaogen]

you misunderstood. that PDB- PT747 uses a Y-Cable at one 8 Pin to make more...
don't do that at home, at least NOT with molex. the outputs of molex can mostly not deliver many current.

Indeed, that's why I've discarded that idea too ... (but the cables DO exist)
ATX S-ATA is about 54W max 1.5A per 12V cable (3 of them) and for an PCIe 8-pin (150W) I'll need 4.2A per 12V cable (3 of them).

to the yellow of the existing 8 pin please.

I don't have any existing PCIe 8-pin on my PDB, that's the problem.
.. or do you mean any other 8-pin? I have an 8-pin going to the motherboard (not compatible as it has 4 12V cables).

 

[NablaSquaredG]

The PDB-PT747 has 8 8-Pin / 6+2 Pin connectors on 4 cables. No need to worry that two connectors are on one cable, Supermicro has verified 4 high-power GPUs with the PDB-PT747

 

[RolloZ170]

I don't have any existing PCIe 8-pin on my PDB, that's the problem.
.. or do you mean any other 8-pin? I have an 8-pin going to the motherboard (not compatible as it has 4 12V cables).

yes, where the yellow cables of that are soldered, you can apply your cables for the GPU.

Indeed, that's why I've discarded that idea too ... (but the cables DO exist)
ATX S-ATA is about 54W max 1.5A per 12V cable (3 of them) and for an PCIe 8-pin (150W) I'll need 4.2A per 12V cable (3 of them).

only wanted to warn: on other PSU the outputs of SATA etc +12V are power limited (mostly included in the ATX24P source)
you can not expect all +12V goes to one rail.

 

[yaogen]

Alright, gotcha @RolloZ170 ... and thanks @NablaSquaredG

In conclusion, if I'm going to modify my PDB, I can add-on new 12V cables to the same place where the, already existing, motherboard 8-pin's 12V is soldered to the PDB. Right?

To make sure, would that location also be "strong enough" for adding 2 new PCIe 8-pin? (as I've 2 graphics cards)

 

[RolloZ170]

To make sure, would that location also be "strong enough" for adding 2 new PCIe 8-pin? (as I've 2 graphics cards)

yes, but you can see yourself if it is a single rail +12V. your PSUs should be strong enough too of course to deliver your add. currents.

 

[RolloZ170]

HERE
of course you need 8 black cables too. you have to remove the PCB, at the back you will see that all Ground and +12V are together connected.

 

[yaogen]

Thanks @RolloZ170 ...

I'm also waiting for Supermicro support to get back to me what this PDB could be (based on case serial).

Will also start ordering the necessary materials for the modifications... This will be fun! ;-)

 

[RolloZ170]

I'm also waiting for Supermicro support to get back to me what this PDB could be (based on case serial).

Will also start ordering the necessary materials for the modifications... This will be fun! ;-)

on your place i would switch to the other (complete)PDB to support the higher watts PSUs later.

 

[RolloZ170]

I'm also waiting for Supermicro support to get back to me what this PDB could be (based on case serial).

??? the Part is visible on the black PSU connector.

 

[yaogen]

on your place i would switch to the other (complete)PDB to support the higher watts PSUs later.

I'll see what the support guys come back with .. maybe there's an "easier" option compared to modding

??? the Part is visible on the black PSU connector.

Ah, you misunderstood me .. the parts in question is the added cables/connectors etc. that I'd need.

 

[RolloZ170]

Ah, you misunderstood me .. the parts in question is the added cables/connectors etc. that I'd need.

i would buy a PCIe PSU extension cable and remove the PSU side connector...