PC3500 Level I (2-3-3) --chip--> Winbond CH-5

Is this correct? CH-5 on all Level one Mushkin PC3500


I have a gig of these but never new what chips they were due to the heat spredders, they would barely do 215mhz2-3-3-10 on my NF7 2.9V and no higher at any timmings. Now on my DFI board I did notice when I gave them 3.1V they went to 234fsb 2.5-3-3 but never pushed the voltage beyond that. If they are CH-5 how much voltage can they take and what speed is possible?