Anyone using 4 gig memory on ASUS P5B-E?

I want to up my memory from 2 to 4 gig, but I have a few questions. First, the manual recommends installing 3 gig or less for 32 bit XP. Anyone using 4 gig for XP successfully? I'm on XP Pro SP2 and plan to use the 3 gig switch. Any BIOS setting to change?

Also, is it better to use 2 slots with 2 gig each or all four with 1 gig each? 1 gig sticks are available with cas 4 latency, but 2 gig sticks only have cas 5. Does that matter?

Any advice is greatly appreciated!

Thanks for the info chookman. Yes, the PAE switch is what I was refering to. Interesting that you say it doesn't work. I've heard almost all positives about it. Maybe it just doesn't work with the P5B family? I thought Windows could use 4 gig and would only allocate up to 2 gig per app, but the PAE would allow 3 gig per app, with 1 gig for Windows.

Thanks for the RAM links. The 2 gig sticks I was looking at only had cas5, but I guess I should have looked harder. I usually stick with Kingston, Corsair or Crucial and am not familiar with the brands you linked. Are they high quality?

I use my PC for pro audio work, which involves a lot of real time processing, so it would probably be worth it for CAS4. I can get a matching pair for my existing 2x1 gig Crucial CAS4 sticks for only $47 after rebate. Pretty amazing, since I paid $300 from Newegg for them 14 months ago! Maybe in a year or so I'll upgrade to Vista64 and buy 4x2 gigs sticks and sell my existing sticks.
http://www.newegg.com/Product/Prod [...] 6820145034

Yes, I think I will go 2x1.

Here's the thread where I've gotten most of the info on the 3gig switch. It's on a hardware forum for pro audo software. Lots of people report success, but I think it has to do with the application.

http://forum.cubase.net/phpbb2/vie [...] itch+rocks