no, pc2100, pc2700, pc3200 is in the category of DDR ram.
Pc 66, PC100, PC 133 are in the category of SDRAM.
They are not compatible.
PC 3200 is compatible with pc2700, pc2100
PC 133 is compatible with pc100, pc66
Core 2 Duo E6400, DFI Infinity 975X/G, 2x 512mb DDR2 667mhz, Albatron 7900gt, WD 200gb SATA, Samsung DVD-RW, Silverstone ST-50EF 500w PSU.