>> Can anyone confirm or refute this information?
> 
> It does indeed look to be the case. I actually ran into this once. I was 
> using an IBM desktop PC that had only 1 GB of RAM, we had on order 
> memory from IBM for it, but the IT guy had another pair of 512MB ram 
> that was originally destined for a CAD workstation, but for whatever 
> reason remained unused. I asked him about it, he shrugged and said I 
> could try it, but he didn't think it would work, since the memory was 
> designed for the workstation. I tried it, and the PC refused to boot.
> 
> I'm pretty sure after what I read about high density ram (I looked at 
> some other info on the subject besides the eBay page, also strange, our 
> firewall doesn't block eBay...) that the ram for the CAD station was 
> indeed high density. I suppose the other alternative is that it was 
> registered memory.

Aren't those usually keyed differently?

> Yep. do the numbers on the chips indicate a 128x4 configuration (hint, 
> you could probably Google the number on the chip and get a datasheet...)

Well, they do have the symbols "128x4" printed on them, yes.

So basically I've been sold a RAM product that doesn't comply with JEDEC 
specifications? That's nice. I don't suppose there's any danger of a 
refund though...

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