Please Guide me to OC my Systems

[HamidFULL]

Hi Guys ,
I want to Overclock my systems with these coolers to reach Max performance when play the games or heavy loads
Overclock can cause damage system? or make short life for system or inverse?
Which software can help me to safe OC?

I have 2 System and I want OC my boys!
first :
Intel Pentium 4 3.2E 478 1MB Cache FSB 800MHz HT+ 90nm 103Watt E0 and 0F41 1.287V - 1.400V current 1.392V
Gigabyte GA-8IPE1000 Pro-G Rev3.1 (Intel 865PE) M.I.B C.I.A
1GB(2x512MB) OCZ Premier Dual-Channel CL2.5-3-3-7 DDR400MHz
200GB SATA Maxtor 8MB Buffer 7200 8ms
80GB Seagate ST380011A PATA 7200.7 Burcuda
Gainward GeForce 6800 Ultra AGP8x Core 400MHz Mem 1100MHz 256MB GDDR3 1.6ns
GigaByte 3DCooler Ultra GT PCU31-VH 4 Heatpipe Full Copper with control 2100 RPM to 5300RPM
CDRW Yamaha 20x10x40x /DVDRW Pioneer 52x32x52x /CDR Asus 40x
Power OCZ 550W

I know that I cant OC Gigabyte in Bios ,its right? How i can OC to Max and Safe performance?
-----
Second :
DFI LanParty 865PE 478
Intel Celeron D 2.53GHz
512MB DDR400 OCZ value
80GB Seagate ST380011A Pata 7200.7
Gainward GeForce 6800 GT GS Core 400 Mem 1100MHz 256MB GDDR3 1.6ns
ThermalTake BigTyphoon 6 Heatpipe
CDR Asus
Power Acbel 300W

How I cant OC my system? when I oc CPU I should oc my ram?
plase help me tanx

 

[imported_Vanden]

Use the search. Try something like"guide celeron" or "celeron +overclock"(without the quotation marks), who knows what crazy results you'll get. Read some overclocking guides.