AMD Unleashes the 990FX: Paving the way for Bulldozer
Word of the AMD 990FX chipset first came around the end of last year. Speculation was brisk as to what new features it would bring, and when exactly it would help to usher in the age of Bulldozer to the world. Most thought that it would be a shrink of the then current 890FX, and the new SB950 southbridge would have improvements to the SATA 6G controller, as well as a native USB 3.0 implementation. Today we finally get to see the reality of the situation. It is not groundbreaking, nor is it altogether exciting, but it is certainly interesting.
The 990FX and SB950 chips are identical to the previous 890FX and SB850. They are the same silicon. For those hoping for new technology will be disappointed. But all is not lost! AMD did increase the HyperTransport specification from 3.0 to 3.1, which allows the HT bus to run at 6.4 GTPS as compared to the older 5.2 GTPS. This is in place to allow the upcoming Bulldozer chips to run the northbridge portion of the chip up to 3.2 GHz, and to give the CPU more bandwidth between the different busses on the board (eg. SATA, USB 3.0, and PCI-E connections).