Samsung Captivate is tested to the limit by clocking in at a speed of 1.2GHz

Don't say that we didn't warn you, but apparently the fun doesn't stop at the speed of 1GHz for the Samsung Captivate's Hummingbird processor. Utilized in all of the Samsung Galaxy S phones out there, the already fast CPU was tested by a couple of xda-developers forum members who managed to kick things up a notch to an even faster, but stable speed of 1.2GHz. However, things can get rather spicy when it's believed that the Hummingbird processor can achieve a mind-bending speed of 1.6GHz – where it'll most likely start to spontaneously explode and rip the fabric of space. For right now though, the speed of 1.2GHz appears to be the most optimal and tolerable speed allowed. So if you want to attempt this feat, you may want to consider the consequences of what can occur before proceeding – such as voiding your warranty or witness the handset fall under the pressure. If you dare to tango with this procedure, then click on the source link to get all the information – but don't say that we didn't warn you.

Samsung Captivate Specifications | Review

source: xda-developers via MobileCrunch