Suitable GPU and PSU

[MomoHirai]

Hi, I am currently using an old pre-built system which is HP dx2810 mt. I wanted to add a new GPU and PSU, but I don't know if it is suitable with the Pegatron 0b1ch Motherboard and fits in the case. Here are my current specs: 

Mobo : Pegatron 0b1ch

CPU: Intel core 2 quad Q9400

RAM: 8GB DDR2

SSD: Apacer 240GB

HDD: 320GB Unknown brand (stock maybe)

CPU Cooler: Cooler Master A93 Mini

PSU: 250 watt

GPU: -

or are there any recommendations? because I don't often play games, just for classes, editing(AutoCAD, etc.), and movies.

[BambiBoomZ]

MonoHirai,

A good performing, compact GPU with a recommended minimum power supply of 250W is the NVIDIA GTX 750 Ti.  These are single height, there are 1GB and 2GB versions (2GB is recommended for the kinds of use mentioned), single and dual fan, open and encased designs, and the GTX 750 Ti does not require a power connection.  The HP dx2810 mt appears to have sufficient space for that model.

BambiBoomZ