Precision Tower 3620

Question

Hey guys, I recently purchased a Corsair rm850x for my precision 3620... I also used an adaptor cable to connect It to the 8 pin on my motherboard as the PSU unit only had a 24 connector. When I turn on the machine , the power light keeps blinking orange . Blinks twice, short pause then resumes.

mazzinia_ · Answer

Can you put back the original psu, to check that the mb wasn't damaged by the 'attempt' ?

speedstep · Answer

GPU connectors are not CPU connectors. Dell 8 pin proprietary is VERY specific. https://www.moddiy.com/products/Dell-OptiPlex-3620-PSU-Main-Power-24-Pin-to-8-Pin-Adapter-Cable-30cm.html

bjackson7 · Answer

Hi! So just to confirm, I have an adaptor cable that looks very similar to that, it plugs into the 24 pin that came with the PSU, then into the 8 .. is that right ?

Or should I try the cable you suggested ?

bjackson7 · Answer

Hi! Yes I've tried this, it still works

bjackson7 · Answer

https://www.ebay.com.au/itm/24Pin-Female-To-Dell-Optiplex-Server-Motherboard-8-Pin-Male-Adapter-Power-Soh2-/143942994937?_trksid=p2349624.m46890.l49286

mazzinia_ · Answer

can you maybe link to the cable ? ( if sold on amazon etc etc )

bjackson7 · Answer

Do you have any recommendations on what to try / do ? I'm very desperate

mazzinia_ · Answer

Well, explains it. 'ATX 24Pin Female to for DELL Optiplex 3020 7020 9020 T1700 Server Motherboard 8Pin Male Adapter Power Cable' but you have a 3620 . Dell is proprietary, and things change between new series... i think you got lucky at not damaging anything.

mazzinia_ · Answer

No, and ' Features: Convert standard ATX power supply (up to 1000w) 24 pin power connector to Dell 8 pin proprietary power connector. Compatibility: Dell Optiplex 3020/7020/9020/5040/7040, Precision T1700/T3620, and other 2014+ Dell models using 8 pin proprietary power connector.' from another auction... so it hints that actually the cable you have should work

mazzinia_ · Answer

Maybe the cable you got is defected ? Do you have a tester, to check if all pins work ?

speedstep · Answer

The cable he is trying is not working and has no brand.

Moddiy cables work which is why I use them.

https://www.moddiy.com/products/Dell-OptiPlex-3620-PSU-Main-Power-24-Pin-to-8-Pin-Adapter-Cable-30cm.html

cnrylmz · Answer

I think you forgot to input the cpu 4 pin cable of the new psu to the MB. This is the same mistake that I just made :).

For anyone looking for a cable; imo any cable with the same pinout with the images in this discussion would work fine but dont forget to check the pinout and the voltages.

Precision Fixed Workstations

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