No you must have a Nvidia Graphics card/mother board / or cpu...
all cards are different therefore there is no set limit you have to find out yourself
I think you can change it by going to the Nvidia control Panel. If not, you can download a free program such as Rivatuner or nTune
One can purchase NTune headphones by going to Office Depot. Office Depot sells NTune headphones both in their retail stores and online on their website's store.
No not all of then just the monster ncredibles npulse and ntune
You should have some kind of "control panel" for your card look around in there. -- Actually, a really nice control panel for those sorts of things is "ntune". http://www.nvidia.com/object/ntune_5.05.54.00.html It's a control panel for pretty much anything with graphics... not just overclocking.
Gotoh, Schaller, Sperzel, Quick Time, Behringer, Korg, Sabine, NTune, Gibson, Snark, TC Electronics, Fender, Peterson, Planet Waves, Fishman, and Samson.
Kevin Seldon has: Played Johnny in "Passions" in 1999. Played Bartholomule Julian (BJ) in "Ntune: The Life of a Boyband" in 2000. Played Triathlete in "Alias" in 2001. Played Bill in "Bill the Intern" in 2003. Played Kevin in "That GPS Cray..." in 2014.