HI. I am new to the dell community and will try to be short. I am upgrading an old GX620 desktop (not the tower). Does the gx620 support the Cedar Mill Pentium 4 CPU'S? i have been thinking about getting a 661 model. also, what ram speeds does it support? I have heard that it supports 400 and 533, 533 and 667, and up to 800. so what are the real supported speeds?

 

 

 

 

My system:

Pentium 4 3.0Ghz Irwindale

1.25 GB 400Mhz ddr2 RAM

40GB HDD

CD/DVD rom drive

280 watt power supply