i have a problem about booting my computer and it realeses a beeping sound inside my casing i dont know where it came from.It all started when i change my psu to 650 watts my previous psu is 250..I change my psu because my gpu requires more watts about 400 watts.I also bought 4 gb ram to add more power to my computer.After i put it all together in their places and i turned it on it realeses a beeping sound inside my computers casing and theres no display in the monitor.Please help me!!!!(sorry about my grammar hope you understand what im saying)