"Two-story" 256 DIMM memory chips, for what kind of PC?

I won a bid on a lot (16) of DIMM memory, supposedly 256 MB each.
I did not pay attention on the description when bidding, thing is, these chips are like double the height of a 'regular' chip, what kind of memory is it?, I don't know: SDRAM?, ECC?, EDO?, non-ECC?, NP?. The guy selling mentioned something about "Unisys". The memory modules have 36 IC chips (18 on each side). Numbers and letters on them go like: " NEC UK D4265405G5-A50-7 JD 9928ESL 02 ".
The manufacturer is Viking Components.
Will appreciate any help / input
TIA
efrain12Asked:
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nobusCommented:
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efrain12Author Commented:
What I really want to know is, if there's anything I can do to use this memory chips on my computers. My machines are IBM-compatible, most of them Pentiums  from 400 MHz to 2.4 GHz
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nobusCommented:
look here for specs : (4X256MB) EDO ECC Buffered-3.3V 168Pin DIMMs

http://www.trademe.co.nz/Computers/Servers/Server-components/auction-53632546.htm

if your motherboard can handle this, it should work
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efrain12Author Commented:
This is what I was looking for, now I know it's EDO, ECC memory.
Thanks a lot!

Efrain Portales
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nobusCommented:
no problem !
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