I have two 168 pin 64MB SDRAM PC100 CL=2 sticks. One is labeled PC100-222-620, the other PC100-322-620. Both were manufactured by Micron (the first one is from Crucial the 2nd came with the PC). Is there any significance to the 222 vs 322 or are these just part numbers? Both seem to have the same specs otherwise. Both should be non-parity.