Dirkvoodoo said:
1) Will it fit my Antec P160, the 160 mm will fit inside the case no problem, but im wondering are there any other clearance issues that other P160 owners may have noticed.
All motherboards are different. Just because it fits for one P160 owner doesn't mean it will fit for you. I'm pretty certain it will though.
Dirkvoodoo said:
2) Some customer review here said that if you own a gigabyte board, you need a metal backing plate not sold with the cooler. Is this for LGA775 boards? Have you guys had to purchase a separate plate?
The Ultra 120 comes with what is quite possibly the best mounting mechanism for LGA775 motherboards yet devised. You don't need to buy anything. I do wonder where those reviews come from sometimes. Some of them are complete nonsense.
Dirkvoodoo said:
3) I've noticed those annoying "push-pins" with the stock cooler are causing some minor warping of my board, really grinds my gears, will the weight of the Ultra cause any bending issues?
You will have to remove the motherboard to fit the Ultra 120. The mounting mechanism is incredibly cunning though. The only area that contacts the motherboard is a small square of open metal directly under the CPU socket. The arms of the cooler retention mechanism are then bent back from this by a tiny amount and the female screw-down fittings then poke up through the motherboard mounting holes. You then screw the male fittings down into those holes with tensioned springs. This means four things;
1. The CPU cooler screws down into the mounting bracket and all the tension is at that open square under the CPU - exactly where you want it to get optimal CPU/Cooler contact.
2. As the arms of the CPU holder don't touch the motherboard and the Cooler screws into the CPU holder, the motherboard CANNOT bend.
3. As the spring tension has been properly calibrated by Thermalright, and the threads are just the right length, you just screw the threads down until they are tight. There is no requirement to 'feel' the pressure or balance up the corners. You just screw it down and it's perfect. Every time.
4. Because of the construction of the CPU retention back-plate the female threaded mounts cannot fall down through the holes in the motherboard if you dismount the cooler with the motherboard in the case. This means you can remove the CPU cooler if you need to, without having to remove the motherboard.
I really do take my hat off to Thermalright for the way this CPU retention mechanism is designed. It's the first properly engineered solution I've seen, and it's a joy to use.
Additional fan brackets are available for about £1.50 from Thermalright dealers that stock the full range of Thermalright parts (Overclockers don't) and I would strongly advise you to contact a proper Thermalright dealer for advice on fitting etc. as OcUK are great if you know what you want, but they're a bit short of actual shop support. They'll send you here and we can't tell you where to buy the right bit of kit because it's an OcUK competitor but OcUK refuse to stock the whole range becasue it's not profitable to carry so many slow-moving parts in stock. Catch 22.
at the end of the day its your choice but I wouldn't wish the hassle I had with mine on anyone and I still reckon you could make a better heatsink from a crushed coke! 
