There's already a ddr2 thread , with FPY5 results in it.

Juz giving usome infos, fpy5 rev B can take tighter timings, 5-5-5-15, the C revision is best at 5-6-6-15. Urs is probably C revision, so adjust it accordingly

well i got mine (C revision) to ddr2 1100

if you look at the chip below, which is a patriot 667 value rams DDR2

Notice these 4 lines

Hynix            KOR                <=== Brand (duh!)

HY5P512812C            <=== The last alphabet will tell u what rev it is

FP-Y5    711AA                    <=== chip model and 711AA is batch code, try to match this with your second stick

MTFxxxxxxxxxxxxx              <=== wafer code, match this last after matching the above 3 for max oc potential