power consumption concerns

I have this power supply http://www.newegg.com/Product/ShowImage.aspx?Image=17-371-007-09.jpg%2c17-371-007-03.jpg%2c17-371-007-04.jpg%2c17-371-007-05.jpg%2c17-371-007-06.jpg%2c17-371-007-07.jpg%2c17-371-007-08.jpg&S7ImageFlag=0&WaterMark=1&Item=N82E16817371007&Depa=1&Description=Antec+earthwatts+EA500+500W+Power+Supply

I am running three hds:
1.) a Seagate 500GB 3.0Gb 16MB SATA
2.) a WD 400GB 400Gb 16MB SATA
3.) a Seagate 250GB IDE

One DVD RW dual layer drive
One card reader
An integrated 6150 LE nVidia Geforce card
A 8800 GS 384MB EVGA card (just got this one)
4GB (4 x 1GB) Gskill DDR2 800 (6400) memory sticks.
I have a AMD Athlon 64 X2 processor (3800).

Am I overloading it with this Powersupply. If so, what should I remove.