Question My CPU overclocking menu is locked in BIOS?

[bobbyboi]

I recently installed an i7-870 and went to Advanced BIOS to overclock it. However, it was locked? Here is an image. Also, is 65 degrees Celsius for web browsing, etc bad for my CPU? I want to know in case I applied my thermal paste incorrectly. Also, when I open CPU-Z, it says I have only 2 cores and 4 threads when it should be 4 cores and 8 threads?

 

[rgd1101]

prebuild don't usually allow oc.
latest CPU-Z?
using a different cpu cooler then the old one for the i5-650?

 

[bobbyboi]

prebuild don't usually allow oc.
latest CPU-Z?
using a different cpu cooler then the old one for the i5-650?

If prebuilds disallow overclocking, how can I potentially bypass this lock?
I fixed the 2 cores, 4 threads issue.
I've purchased and am now waiting for delivery of a Deepcool GAMMAXX 400 to compensate for my i7-870's heat.

 

[rgd1101]

If prebuilds disallow overclocking, how can I potentially bypass this lock?

buy a retail motherboard, but for old cpu like that, it really waste of money.

 

[bobbyboi]

buy a retail motherboard, but for old cpu like that, it really waste of money.

I'm currently 13 so my build is more than enough however when I'm 15 and hopefully have a job, I'll save up $1,000 to purchase computer parts. Maybe a max of $1,500.