I did some research on overclocking and the GTX 550 TI. OCing results seem to vary by brand, others have overclocked to a stable 1000mHz with their EVGA card then another result for another brand of card. The problem is I can't seem to find a review for my Palit GTX 550TI, all I found was for the Palit GTX 550TI 'Sonic' edition. I've read the safest way to OC is to increment the core clock by 10's, do some benchmarking and stability results until you reach your threshold. I've also read to not alter the memory clock because it doesn't seem to do much and causes instability.
Btw here are my system specs, sorry for not posting them earlier.
Processor -Intel Core i5 3450
Mobo -MSI H61M-P31 (G3)
8GB DDR3 RAM
GPU - Geforce GTX 550TI (Palit)
PSU -500W Cougar ST
Also, I want you guys to know I have no cooling system. I've read to tone down the OCing if you have no cooling system. Although I have two fans in my AeroCool casing and I always play in an airconditioned room. (If thats a factor) Sorry I'm new at this and I'm just researching the hell of out this first before I start OCing. It would really help for someone who has this same card to give me their findings.