Hi, during to holiday sale of feb, i need to get a power supply asap. Im currently on a budget $50. I saw a psu from newegg thats $40 including shipping. Same goes with ncix. Im really concerned that my tower may not fit the psu. My currently tower is hp pavilion p6211f. If anyone can help me, please post here. Im really desperate to run my ati radeon hd4650 again. I need a 400+watts. Thanks!