Apparently forgetting all the hard work it put into dispelling the 'MHz myth' with Athlon 64, AMD is boasting its latest Radeon HD 4890 has reached the 1GHz mark. A world's first for a factory-overclocked, air-cooled card says AMD.
That's a pretty significant improvement over the 850Mhz core clock of the 'vanilla' 4890 - about 18 per cent in fact. If you like teraFLOPs as a measure of computing power, a 1GHz 4890 will apparently deliver 1.6 of them.
Whether that will translate into a similar jump in real-world performance will, obviously, depend on the rest of your system -and what you're doing with it. It's also worth pointing out that, while AMD is probably cherry picking 4890s capable of hitting 1GHz for these cards, there's nothing to say a normal, 850MHz, 4890 won't also reach similar levels of overclock.
AMD isn't mentioning pricing for the 1GHz 4890 but it seems likely that a nigh-on 20 per cent performance boost will see at least a similar hike in the card's MSRP.