Large graphics support on HP ProDesk 400 G1 SFF

[JavifocusYT]

I cuestion

 Hello, good afternoon, I have an HP ProDesk 400 g1 SFF, I know and understand that it is a somewhat old product, but I had doubts because a few days ago I tried to put a Gigabyte Gtx 960 G1 Gaming 2gb graphics card on it. But my power supply doesn't have enough capacity and neither does it have the 6-pin PCI-E connectors. But connect the original source of it to the motherboard and put the graphics card in the proper PCI-Express port on the motherboard, But additionally use an EVGA certified source To use the 6pin PCI-E power connectors and connect them in the graphics card, but the graphics card turned on all right and the motherboard from its DVI port gave an image but from the graphics card it did not and I was somewhat confused because the graphics card had turned on and everything but the machine did not take video from the graphics card. And the doubt I have is that if the motherboard of my equipment supports these large graphics, because as I explained I used an external source to be able to make the graphics turn on, but even so the motherboard gave video through the internal DVI and not through the Graphic card.

[NonSequitur777]

@JavifocusYT,

Welcome to our HP User Forum!

You can certainly sync/daisy-chain a secondary power supply to your HP ProDesk 400 G1 SFF to power an upgraded graphics card, but it requires a special "ATX PSU ADAPTER ATX 24-Pin to SATA Power Supply Adapter" to make that work.  If interested, and for how-to instructions, please browse through my HP EliteDesk 800 G3 SFF upgrade link, beginning at page 4: Solved: Upgrading HP EliteDesk 800 G3 SFF - Page 4 - HP Support Community - 8251218.

Here you can see other HP ProDesk 400 G1 SFF users who were able to connect powerful graphics cards using the power supply sync method: UserBenchmark: HP ProDesk 400 G1 SFF Compatible Components.

Hope this was helpful.

Kind Regards,

NonSequitur777