Accelerated Graphics Port caused Intel to pull out of the initial PCI-X effort". The PCI-X interface was however briefly adopted by Apple, for the first few generations of the Power Macintosh G5. The first PCI-X products were manufactured in 1998, such as the Adaptec AHA-3950U2B dual Ultra2 Wide SCSI controller, however at that point the PCI-X connector was merely referred to as "64-bit ready PCI" on packaging, hinting at future forward compatibility. Actual PCI-X branding only became standard later, likely coinciding with widespread availability of PCI-X equipped motherboards. When more details of PCI Express were released in August 2001, PCI SIG chairman Roger Tipley expressed his belief that "PCI-X is going to be in servers forever because it serves a certain level of functionality, and it may not be compelling to switch to 3GIO [PCI Express] for that functionality. We learned that from not being able to get rid of ISA. ISA hung around because of all of these systems that weren't high-volume parts." Tipley also announced that (at the time) the PCI SIG was planning to fold PCI Express and PCI-X 2.0 into a single work tentatively called PCI 3.0, but that name was eventually used for a relatively minor revision of conventional PCI. PCI-X 2.0 In 2003, the PCI SIG ratified PCI-X 2.0. It adds 266-MHz and 533-MHz variants, yielding roughly 2,132 MB/s and 4,266 MB/s throughput, respectively. PCI-X 2.0 makes additional protocol revisions that are designed to help system reliability and add Error-correcting codes to the bus to avoid re-sends. To deal with one of the most common complaints of the PCI-X form factor, the 184-pin connector, 16-bit ports were developed to allow PCI-X to be used in devices with tight space constraints. Similar to PCI-Express, PtP functions were added to allow for devices on the bus to talk to each other without burdening the CPU or bus controller. Despite the various theoretical advantages of PCI-X 2.0 and its backward compatibility with PCI-X and PCI devices, it has not been implemented on a large scale (). This lack of implementation primarily is because hardware vendors have chosen to integrate PCI Express instead. IBM was one of the (few) vendors which provided PCI-X 2.0 (266 MHz) support in their System i5 Model 515, 520 and 525; IBM advertised these slots as suitable for 10 Gigabit Ethernet adapters, which they also provided. HP offered PCI-X 2.0 in some ProLiant