Z620 and RX 480 8 pin power connection

[eSpecialTV]

I recently bought HP Z620 for some 4k video editing work. It came with old Quadro 600 gpu, so needed to upgrade that.

Now i have orded this card: http://www.mindfactory.de/product_info.php/8GB-MSI-Radeon-RX-480-Gaming-X-Aktiv-PCIe-3-0-x16--Retail...

The problem I now noticed is that the adaptercable http://www.mindfactory.de/product_info.php/0-20m-Delock-PCI-Express-Stromadapterkabel-6pol-PCIe-Buch... may not be safe to use to connect from Z620 6 pin connector to RX 480's 8 pin power in. Is that so?

[MtothaJ · Accepted solution]

---

@eSpecialTV wrote:

I recently bought HP Z620 for some 4k video editing work. It came with old Quadro 600 gpu, so needed to upgrade that.

Now i have orded this card: http://www.mindfactory.de/product_info.php/8GB-MSI-Radeon-RX-480-Gaming-X-Aktiv-PCIe-3-0-x16--Retail...

The problem I now noticed is that the adaptercable http://www.mindfactory.de/product_info.php/0-20m-Delock-PCI-Express-Stromadapterkabel-6pol-PCIe-Buch... may not be safe to use to connect from Z620 6 pin connector to RX 480's 8 pin power in. Is that so?

---

On a Z420 with 600W PSU I am running a GTX1070 G1 Gaming with a 8 pin connector and am using a 2x 6pin to 1x 8 pin adapter with no problems whatsoever. If you have 2x 6pin PCIe power connectors I would suggests that that would be the prefferred approach for connecting your card.

That said, the connector you linked should also work. The main purpose of the 8 pin connector vs the 6 pin is additional grounding pin which 'tells' the PCIe device that the connected PSU is man enough to supply the required power and the 800W PSU in the Z620 should be more than plenty to do that.

[eSpecialTV]

Thank u for the reply. Just want to be sure before making something stupid (once again)...

[SDH]

The 6-wire auxiliary power cables that come out of the Z workstation's power supplies are rated for higher amperage than the ATX standard.  You'll be able to find in this forum my post on that, and the HP PCIe supplemental power cable's rating is on a label on the power supply if you look.  There are two.

That is why HP has some straight 6-to-8 adapters or 6-to-two-6 wire adapters, but I know of no source where you can buy those directly from HP.  Regardless, you'll have more than enough power if you use a high quality 6-to-8 adapter.  Don't get a cheap one which does not transfer power wires on through to the pins, however.  Some you'll see are pretty anemic in their build engineering...... not so if from HP.  

Also, be careful that you are getting specifically a PCIe supplemental power cable adapter.... there are some odd 6-pin-to-8-pin motherboard adapters that have different shaped plastic parts to try to keep you from forcing them into the wrong sockets, but a strong novice could do it.......