Dell Optiplex 990 Power Supply Upgrade

Will any atx power supply fit in the 990 minitower.

Dell optiplex 990 power supply upgrade. The system comes with 265 watts but i d like to install a more powerful supply so i can upgrade the video card to whatever i want. But its some funky size mobo. The system comes with 265 watts but i d like to install a more powerful supply so i can upgrade the video card to whatever i want. Will any atx power supply fit in the 990 minitower.

This item 400w power supply upgrade for dell slimline optiplex 390 790 990 7gc81 6mvjh thermaltake smart 500w 80 white certified psu continuous power with 120mm ultra quiet cooling fan atx 12v v2 3 eps 12v active pfc power supply ps spd 0500npcwus w. The power supply has to be equal or smaller than 9 5 by 2 8 by 2 4 inch and produce more than 400w thanks in advance. 30 days warranty labor. So its not that cut and dry.

On newegg the sizes of the various power supplies seem to be slightly different dimensions than the dell optiplex 99. View return policy 37 62. The original plan is was to transplant the system into a bigger case. Gotta get crafty but no big deal.

What im wondering is will this computer accept a larger power supply. 30 days warranty model. Looking for a power supply upgrade for my optiplex 990 sff so i can install a decent graphics card.