Overclock a Dou2QuadQ9650 on P5q-e board,help find stable overclock

Nimutu48 · September 5, 2019

Someone said its good for overclocking and internet said 4,2 is possible with it but i have no idea about anything.
hope for help to overclock it for stable for "24/7 " gaming .
dont want it at top of the maximum, but some stable new clockspeed shoud be ok iguess.

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inside of my pc :
Motherboard : P5q-e
Processor : Intel core 2quad Q9650 3.0 ghz
Processor cooling : is acctualy some type of water cooling system but no idea about the name.
My ram : is not 4 times the same, must i overclock ram options in bios too or can i leave them on standart ? is there any difference ?
https://prnt.sc/p210rg
gpu : shoud be that one > https://www.pcbilliger.de/622/radeon-r7-240-4gb-ddr3-1x-vga-1x-dvi-1x-hdmi-inkl.-einbau?gclid=EAIaIQobChMI-OSM6IW55AIVjOd3Ch3K3A1WEAQYASABEgL7ZPD_BwE < but acctualy not realy sure about it . its flashed acctualy but that shoud not be interesting.
(win 7 if there is any differnce o.o)
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Some information about the parts that are listed ->
processor :https://ark.intel.com/content/www/de/de/ark/products/35428/intel-core-2-quad-processor-q9650-12m-cache-3-00-ghz-1333-mhz-fsb.html
Motherboard : https://www.asus.com/de/Motherboards/P5QE/specifications/ ( acctualy a de side dont found it on english )

this is the bios i can move inside acctualy :

View: https://www.youtube.com/watch?v=tAYTaaVJ2wY

i dont trust this youtube video and dont want to shoot it down with first try