First of all, the first 5 images is broken, can't see it.
Second, have you take a look at our 4Ghz Club thread?
It has most information relating to how to OC i7 bloomfield over 4Ghz or beyond.
Third, I don't care whoever say i7 can operate up to 90°C or even only few minute for benching. I would said they are full of hot air. High heat will degrade the chip life expectancy even in a short period of time. You will have more chances of stability if the chip temperature is under 80°C, you might survise few odd stress test here and there but you have the unpredictable crashes in one for awhile.
It's no doubt the 950 can go beyond 4.2Ghz as long you can keep the temperature under 80°C.
Your BSOD have serveral issues;
1) Incorrect voltage for bothe Vcore, QPI/DRAM
2) You push your RAM to hard
4) if you use XMP profile you don't modify the timing, right?
5) your D0 950 doesn't need that much of voltage
Ok, if you can fix the broken images and give me your RAM specs and I will move your posts over the 4Ghz Club thread so we can keep everything relate to OC i7 over 4Ghz in there. This will help people to find all the information they need in one place. I think we have to many thread discussion how to OC the i7
Then I will guide you through 4Ghz first and if you still have super temps then you can push it to 4.2Ghz but be warnned, the heat & voltage jump big time from 4Ghz to 4.2Ghz.