Will This Work?.

Nvidia GeForce FX5500 on a 250 watt PSU and will Microsoft Flight Simulator X run good?

Well this is min requirement for the game. I think it will run/look ok but it wont all that great.

Microsoft® Windows® XP SP2 / Vista

PC with 1 GHz equivalent or higher processor

256 MB of system RAM for Windows XP SP2 / 512 MB Vista

14 GB available hard disk space

DVD-ROM drive

32 MB DirectX 9 compatible video card required

Sound card, speakers or headphones required for audio

Microsoft Mouse or compatible pointing device

56.6 Kbps or better modem for online play