I'm not blaming the seller. I sell on ebay myself, i just didn't know enough about RAM, and none of the sort of "guides" to buying RAM say anything about high and low density.
And that's the thing, as i say, i'm a very cheap guy. You can see from my post i'm still even trying to implement my poorly bought RAM stick to save money.
And i've gotten one person saying they're not aware of any problems, and patio saying yes and maybe no... Anyway to know?