Hi all, I just purchased 8GB (2X4GB) for my 1,1 used on eBay. The problem is, they're only registering as 2GB each. They're the right type 5300F 667Mhz, and all the labelling says they're 4GB dimms. However, when I put them in my system, the error LED lights up for one of them. I tried moving them around and no matter where it goes, that red LED follows it. Is one of the sticks faulty? I haven't done the 2,1 firmware upgrade (long story), but would that help? I wanted to troubleshoot before I contact the seller. Thanks so much!