AMD did something a bit surprising today. They've announced a new version of their ATI Radeon HD 4890 graphics chipset that will be factory-overclocked to bump up the standard speed from 850MHz to 1GHz.
This is actually the first graphics processor to reach the 1GHz mark, so congratulations are due to AMD! Plus, this boost actually increases the computing power to 1.6 teraflops from the previous 1.36 teraflops.
Interestingly enough, this hasn't caused the chipset to switch over to required liquid cooling. Fan cooling is still apparently okay, though you can use higher-tech cooling options, if you'd like. The ATI Radeon HD 4890 graphics processor is compatible with Windows systems at this point in time.