Enclosure & Hardware Discussions
Dell DA2 with uncommon 5.5x2.5mm DC jack -> mod required to attach to EXP GDC 8-...
 

Dell DA2 with uncommon 5.5x2.5mm DC jack -> mod required to attach to EXP GDC 8-pin input as EXP GDC DC jack is unreliable  

  RSS

(@hendra_pongrekun)
New Member
Joined: 2 years ago
 

Hi, 
I just started my journey in eGPU and decided to go with my Lenovo m93p tiny pc. 

The specs:
Haswell i5 4590T
16gb ddr3l 
240gb wd green ssd
Intel HD4600 igd

Purchased following for the egpu:
EXP GDC v8 with mpcie cable
Asus GT1030 w/ passive cooling 
IBM 12v 10A adaptor with 5.5mm jack
Dell DA2 with 5.5mm jack

The process I went through was pretty much straight forward with no issue. Just plug the mpcie to the slot in the m93p,  power on everything and my pc detect the egpu. 

The issue I had is the 12v DC port in exp gdc is quite loose. Tried with both IBM n Dell adaptor and need to find the right position until the exp gdc is correctly powered. 

So I'm wondering if I can create custom cable from the adaptor male dc jack to 8 pin pci power slot in exp gdc to make a proper contact. 

Dell DA2 comes with Barrel jack:
Dell DA2 with Barrel jack

This is the female dc jack :
DC female Jack

And this is the male 8 pin pci power plug I'm going to use:
8 Pin Pci cable

So I'll cut the molex connectors, group all yellow cables and connect them to the + slot in DC female jack, the same with black wires to - slot. 

Then I connect the da2 male jack to this new cable and the 8 pin pci male goes to the 8 pin power slot in exp gdc

Any concern should I consider for this mod? Appreciate all inputs. 

Thanks. 

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined: 3 years ago
 

The female DC jack is likely to have problems with high 220W power throughput.  An easier and known working fix to your issue is to obtain and use a common 8-pin Dell DA-2 PSU and plug it in directly into the EXP GDC 8-pin connector for it. Then recoup costs by selling your rarer DC-jack Dell DA-2.

eGPU Setup 1.35    •    eGPU Port Bandwidth Reference Table


ReplyQuote
(@hendra_pongrekun)
New Member
Joined: 2 years ago
 

@nando4 thx for your inputs

The problem is I couldn't source the da2 with 8 pin locally at least to date. I'm still trying to find one. The problem also occur with the IBM adaptor which is 120w,  less than 150w specified for the dc jack in exp gdc. I think it's more on the physical dimension. 

Further reading and found that the dc female in exp gdc is 5.5mm x 2.1mm while my da2 is 5.5mm x 2.5mm.

If I could find dc female Jack 5.5mmx2.5mm do you think my plan to make custom cable will work?

Thanks. 

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


ReplyQuote
(@hendra_pongrekun)
New Member
Joined: 2 years ago
 

Update :

Found that the polarity of 8 pin power socket on exp gdc is different with the normal 8 pin male pcie power so need to cut few corners to match the polarity.

Refer to the 8 pin power cable came with the exp gdc, I only need 2 pin for + and another 2 for -. As for the green cable connected to 20 pin atx I don't think I need one since my DA2 is by default set to on indicated by the green led on the body of the power brick as soon as I plug it to wall power outlet. 

To turn the power on and off I use a DC female to dc male cable with switch.

Dell DA2 - - > switch - - > custom 8 pin cable - - > exp gdc

I then test the whole setup and everything works perfectly.

I ran the unigine heaven for 30 minutes and didn't notice any power glitch. I know my Asus GT1030 TDP is only 30 watt while the DA2 can supply 216w so I assume this setup is ready for upgrade in the future. 

Here's the Pic of the cable :


Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


ReplyQuote
(@kjan1996)
Active Member
Joined: 12 months ago
 
Posted by: swoofz

Update :

Found that the polarity of 8 pin power socket on exp gdc is different with the normal 8 pin male pcie power so need to cut few corners to match the polarity.

Refer to the 8 pin power cable came with the exp gdc, I only need 2 pin for + and another 2 for -. As for the green cable connected to 20 pin atx I don't think I need one since my DA2 is by default set to on indicated by the green led on the body of the power brick as soon as I plug it to wall power outlet. 

To turn the power on and off I use a DC female to dc male cable with switch.

Dell DA2 - - > switch - - > custom 8 pin cable - - > exp gdc

I then test the whole setup and everything works perfectly.

I ran the unigine heaven for 30 minutes and didn't notice any power glitch. I know my Asus GT1030 TDP is only 30 watt while the DA2 can supply 216w so I assume this setup is ready for upgrade in the future. 

Here's the Pic of the cable :


hello im need help, can you do a video of your connection power supply working on the notebook

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


ReplyQuote
(@kjan1996)
Active Member
Joined: 12 months ago
 

ah, and can sayme which is the + and - on the connector 5.5 mm to 2.1/2.5 ? example inside +, outside - or vice versa

 

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


ReplyQuote
jorgehardaway
(@jorgehardaway)
Active Member
Joined: 2 years ago
 

Hello,

I got for free a Dell DA-2 with the barrel connector (not the squared connector). I would like to have a eGPU as cheap as possible, and I am thinking on the GDC beast. 

Is the Dell PSU with barrel connector a no-go even for graphic cards with low power consumption? (GTX950TI)

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


ReplyQuote