Welcome to sleepless night. Your rig looks pretty similar to mine but jz tht i use c2d only.

But that doesnt matter as it is the same step for o'cing.

Firstly for the boot time. It does not have anything to do with Processor speed but RAM quantity. 4gb is optimum and further boot speed has to do with internal setting.

As for O'cing, Google CPU overclocking ... (Duhh) lolz. Here is a source that kick start me for that.

www.legionhardware.com

Read his article on E4400, E6400 and so on. It tells you simple step on what you should be doing in bios.

showing bench is pretty useless cos it only shows results. What u need is head knowledge.

you didnt mention how much is your vcore and proc speed, it'll be hard to judge what 'normal' is.

If u didnt o'c and ur temp is already like that, it isnt safe till you get proper cooling.

and it also depends on how much tolerance you can handle. My rate is 60*C max. Anything above 60*C i will drop speed or vcore.

If u think 70*C is ok, then go ahead. But watch out for Tjunction(max temp) on your proc.

firstly u did not try overclocking and

secondly u did not respond to my answer after telling u about the temp

thirdly u did not stay on ur own topic but bring some other issue out.