Google tells me that HK$ 10K is just under US$ 1300.
... 135 views and no replies?????
I was telling you why I suspect that you had no replies.
Second, you should have posted system specs. Practically everything except the drives and video card affects the system overclock. That includes the CPU, RAM, motherboard , PSU, cooler, and case.
Third, if your computer keeps crashing, that
is the first problem you need to solve.
Fourth, if you expect to get anything more than maybe a 10% - 20% overclock, you will
need better cooling.