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- Power connectors a HP Z4 G4 graphics card upgrade

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03-08-2020 11:44 AM
Hi,
I'm attempting to upgrade from an AMD FirePro 3100 to a GTX 1660TI. The GTX requires additional power, 8 pin Molex, and it appears that I have 2 6+2 connectors routed to the front panel area but are not connected to anything.
6+2 here means a single 6 pin connector where 2 wires are coming out of two of the pins into a 2 pin connector. The first cable connectors are labeled G1(6pin) & G1-1(2pin). The second cable connectors are labeled G2(6pin) & G2-1(2pin). Can I use one of them (g1/g1-1) to in effect create the 8 pin I need to power the GTX card?
Thanks
03-09-2020 12:29 PM
It is a little more nuanced than that. If you are seeing that then you have one of the 6 + 2 setups. There are 4 listed power supplies for the Z4 G4. Note that the 18A current limit for virtually all modern HP workstations per 6-pin PCIe supplemental power cable is much higher than the ATX standard (which is 75W each). 18 x 12 = what the HP ones can provide. Thus a high quality 6-to-8 pin adapter can be used with confidence as long as you know what you're doing in terms of total load. Here's from the quickspecs: