A-Tech Components 2GB kit (1GBx2) DDR2 Memory Modules

Purchased (2) sticks of PC2-6400 2GB, and that's what the package reads. They match the previous (2) sticks identically, and the computer runs without any issue. However, when you enter the BIOS (latest revision 1.60A), it reads all (4) of them as dual-channel 667 MHz sticks, not the 800 MHz speed the package claims they are. I'm not sure if this is a BIOS limitation, but it's disappointing. Since they're so inexpensive and the PC is running fine, I'm not going to return them. I just wish I was getting the speed they're rated for, especially since I also upgraded the CPU to a Intel® Core™2 Quad Processor Q9500 running at 2.83 GHz, 1333 FSB.