2GB RAM too much for 1Ghz Powerbook?

Hi
In order to speed up my G4 17" 1 Ghz Powerbook, especially for Photoshop Elements, I upgraded to 2GB RAM. The Crucial Memory Scanner said that was the max allowable (although I ended up buying Samsung memory from an eBay dealer). My computer seems to be actually working slower now, though it is basically working ok. On looking at the tech spec for my Powerbook from Apple Support I then found this: "two SO-DIMM slots support up to 1GB".
Have I put in too much RAM now (who is right about my memory capacity - Apple or Crucial?), or does it make a difference that I bought cheaper RAM than Crucial or Kingston for example? (Presumably if the RAM was suspect I'd have bigger problems?)
Excuse the scattergun questions - I'm just trying to work out if I'd be better off reinstalling my original pair of 512MB modules, or leave in the 2GB and look at other issues in my computer for improving speed.
Many thanks.

To add to eww's excellent advice, there is a note on my RAM vendor's website page for your PowerBook stating that the 17" G4 1G PowerBook is one of four PowerBooks that uses "bus slewing" and have special RAM requirements.
I recall a couple of years ago there was a little...well, call it a "public disagreement" for lack of a cruder term....among RAM vendors over bus slewing and the right RAM. Crucial was accused in these forums and by other companies of failing to recognize the requirements bus slewing placed on the RAM. However, this seems to have settled down as I see posts here stating more recent Crucual RAM worked. You could call Crucial and ask if the part number you bought supports bus slewing. I'm sure they will make certain you get the correct type from them.
Oops, nearly forgot! Bus slewing is explained in this Apple Technical paper on the 15" 1 G PowerBook. Scroll down about a half page to the section "Processor and Bus Slewing."

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RIPJDilla wrote:
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ds store wrote:
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2GB RAM too much for 1Ghz Powerbook?

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