The following applies ONLY if selected memory is to be utilized in a Apple PowerBook G4/1.0 or 1.25GHz FW800 Model.

For those with PowerBook G4/1.33GHz and faster or iBook G4s - the following does not apply. It only applies to PowerBook G4 1.0GHz / 1.25GHz FW800 machines.

OWC has determined that an unknown amount of PowerBook G4 15" FW800 Models with 1.0GHz or 1.25GHz Processor speed, have a memory controller issue that significantly restricts the memory compatibility. There is no way to pre-determine if your PowerBook G4 will have this issue, but if you are upgrading a PowerBook G4 15" with 1.0GHz or 1.25GHz G4 Processor Speed, this possibility does exist. No other PowerBook/iBook model or speed is subject to this memory controller issue.

Although you still may continue with the purchase and try the module selected, we do recommend the Factory OEM Samsung PC2700 Module available by clicking here. Should you purchase the selected module and have an issue, you do have the option to exchange for the Samsung within 30 days for the difference in current price plus freight charges.

After testing with other Factory Original as well as Major 1.0GHz or 1.25GHz processor. This is not an issue with the quality of the modules tested and all OWC memory is of Top Quality, meeting or exceeding Apple specifications, and backed with a Lifetime Advance Replacement Warranty as well. We believe the problem is related to a memory controller that was used in some 1.0GHz or 1.25GHz Powerbook G4 systems that has a specific tailoring to Samsung die/pcb memory. And this is why, regardless of specification - only specific Samsung modules provide operational compatibility.

If you still have questions please contact us.