Whatchu think of these DDR modules

Yo all,

I recently bought a 512 Mb DDR module on ebay, but sold my computer the day after I won the auction.
This morning I won another memory auction: two ECC/REG modules á 512 Mb each.

I would like some opinions on these modules. They are:

*Kingston ValueRAM DDR PC2100 cas2 512 Mb
part #: KVR266X64C2/512

*Crucial DDR ECC/REG PC2100 512 Mb, micron chips
part #: CT6472Y265I18T4

regards,
Henry

I can tell you the ECC modules can be harder to overclock.

But... They are crucial. That ECC Crucial Module is quality, expensive stuff. ECC Registered is usually used on servers. Crucial is usually quality stuff.