Gigabyte GA-P35-DS3 boot problems!

hi ppls i have

Gigabyte GA-P35-DS3
Intel E2180
DIMM DDR2 1GB, 800MHz Kingston CL5
7200 250GB WD Caviar 2500AAKS
-DVD+/-RW Pioneer DVR-212D white SATA
ATX Middle Tower 400W Codegen Briza 6099-CA
ATI Radeon 3650 Sapphire PCI-e 256MB

sometimes boot stack before windows logo on start " just black scren "
and nathing helps cant boot from cd to ..

and sometimes stack on gigabyte logo on start ! so i turn on computer after that gigabite logo "MB log " something with big S :P show up and stack there must restart and after restart all goes normal . i dont know what can help ?? do i need to turn off some setings in bios or something that i dont know :P


first time i use XP now am on Vista ultimate.