Overclocking was my bread and butter as a [relatively] broke teenager in the late nineties, around the era of the first Athlon Thunderbirds, when you could take a 1GHz chip and [maybe] OC it to 1.5Ghz. It was a great time to be alive, and yet this is the first case I've heard of where LN2 would not give you a dramatically better result 99.99%+ of the time! I still miss HardOCP and Kyle Bennett and his team's reviews.
That one t-bird with char spots... It still worked reliably somehow, I might even have it in a box somewhere. Those swirly finned CPU coolers were shit! I came home every day after school and volted/burned the hell out of that poor chip, not realizing what I was doing.. lol.