Dell 755 problem with installing Nvidia card

Question

Hello, I have bought Dell 755 mini tower. I have installed gtx 550 ti. Unfortunately when I plug monitor to graphic card there is no signal. When I plug monitor in integrated everything works but in device manager there is only unknown device on PCI-E. On graphics card field is only integrated intel. I have tried updating bios, Amt Sol, Amt HECI, AMT lms. Still doesn’t start on Nvidia card. Do you have any idea how to fix it?

speedstep · Answer

GTX 550TI is a 150W video card that has 6 pin AUX power connection.

Default Stock power supply will need to be replaced with EVGA 700BR minimum.

Any power supply used will require 25 amps on the 3.3v rails and 150W combined power for

3.3v/5v rails.

https://www.bestbuy.com/site/evga-700w-atx12v-eps12v-80-plus-bronze-power-supply-dc-dc-technology-black/6346160.p?skuId=6346160

Koza112 · Answer

Power supply is not default. I have changed that. I have extra 6pin Connected, but still doesn’t see card in bios.

Koza112 · Answer

Any ideas? Maybe I should change sth in bios?

speedstep · Answer

Specific models of power supply will work. https://www.evga.com/products/product.aspx?pn=100-BR-0700-K1

donm4599x · Answer

Use only Nvidia GeForce GT 1030.

speedstep · Answer

755 mini tower with updated power supply works fine with Zotac 1050TI mini.

Can only be short card. can only use single slot for the bracket.

https://www.amazon.com/ZOTAC-GeForce-DisplayPort-128-bit-ZT-P10510A-10L/dp/B01MCU1ERO

Optiplex Desktops

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