new build issues

Having issues loading the os. One concern is the memory voltage is 1.8v, cannot set the voltage that low in the bios- lowest setting is 1.95v. But the DDR voltage is reading at 2.36v when the system is running. When I try to load the os, it will freeze at different locations during the setup.
help

Window XP home SP2

MOBO- BIOSTAR NF4UAM2G Socket AM2 NVIDIA nForce4 Ultra ATX
http://www.newegg.com/product/produc...82E16813138041

Power- COOLER MASTER eXtreme RP-500-PCAR ATX from factor 12V V2.01 500W
http://www.newegg.com/product/produc...82E16817171018

CPU- AMD Sempron 64 3000+ Manila 1.6GHz Socket AM2 Processor Model SDA3000CNBOX
http://www.newegg.com/product/produc...82E16819104305

Memory- Kingston ValueRAM 1GB (2 x 512MB) 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300)
http://www.newegg.com/product/produc...82E16820144199

HD- Seagate Barracuda 7200.10 ST3250820AS 250GB 7200 RPM SATA 3.0Gb/s
http://www.newegg.com/product/produc...82E16822148142

DVD- LITE-ON 20X DVD±R DVD Burner With 12X DVD-RAM Write Black SATA
http://www.newegg.com/product/produc...82E16827106057