Older Dell - Bought memory, not compatible??

[Liquid_force]

Hi
My parents have an older dell de051 - equivalent to a dimension 1100.
MB is intel 865gv

Intel's memory comment: "Dual-Channel DDR 400/333/266 SDRAM -- Flexible memory technology allows a full spectrum of DDR usage from incredible performance to more cost-effective systems."

Using Newegg's memory configurator I ended up with Corsair xms memory, specifically 2 sticks of CMX1024-3200c2pt. It came in a 2GB kit - TWINX2048-3200C2PT. Seemed like good quality memory, from what I understood it is far higher performance than this computer requires (which I thought was a good thing), and it came with a heat sink and a $25 mail in rebate.
Upon installing the new memory all I got out of the computer was a series of beeps. Going back to the original 256k stick it boots fine.

I would just like to understand what it is about the new memory that makes it incompatible with this computer.

 

[diduknowthat]

http://www.dell.com/content/products/productdetails.aspx/dimen_1100?c=us&cs=28&l=en&s=dfb

Memory: Up to 1GB (dual channel) Shared1 DDR SDRAM at 400MHz for superior performance (Note: 400MHz memory performs at 333 MHz with 533 FSB processors).

 

[Liquid_force]

I've been ALL over dell's site trying to learn something.
Maybe there's something obvious there I just don't understand??
I haven't found anything that says a stick of pc3200 non-ecc won't work.
If you're referencing the "up to 1Gb" I believe that's per slot.

If you look here:

http://support.dell.com/support/edocs/systems/dim1100/EN/SM/specs.htm#wp1076752

Memory connectors
two

Memory capacities
128-, 256-, 512-, or 1-GB non-ECC...

Maximum memory
2 GB

Possible problems I've discovered are the corsair memory is a cl2 module and from what I've read the dell specifies cl2.5 or cl3 (I though a cl2 module would just run at the slower cl3 speed??).
Also the Corsair memory seems to want a slightly higher voltage (2.75) than the 2.5-2.6 (IIRC) of the dell's MB.

But I'm just throwing darts.