Maybe going to Intel's website to find the information will help? It is http://www.intel.com. Hope this helps. Or try to google the problem for the solution? Hope this helps somewhat.

Thanks Duncan!

Unfortunately have done that (Googled until I saw blue in the face. Only produced other DELL users asking the same question), have been there (http://www.intel.com/ ) for many years. Part of the problem is that DELL refuses to give out any technical information on anything. So it becomes very difficult to determine how different e.g. a DELL mother board is, if at all, from any Intel boards with the same chip sets. They are never exactly the same. Intentionally I suppose. The excellent Intel 100 plus pages technical specifications are of some help some times. My DELL boards appear to be made by Intel as the part number starts with AA - xxxxx - xxx but cannot be found on the Intel site. The same for the DELL BIOS that only shows version A0x etc and nothing else, no typical BIOS string. But when you dig into it appears to be made by Phoenix. A BIOS string that one could use after DELL stops supporting their products to go to the Phoenix site to get updated BIOS versions.

So the question remains did DELL have these boards designed so that it is technically impossible to make for instance WOL work or is it a matter of that they did not want to bother and that it could work if one would be able to find the right software, drivers etc on the Intel site? DELL support can't even answer this question. Or is instructed for some mysterious reason not to answer this question.

perhaps the solution i found for the dimension 8300 also works on other dimension systems... look at my posts in this thread for my solution...

http://forums.us.dell.com/supportforums/board/message?board.id=dim_network&message.id=27956

Thanks much krikkit_war!

Tried it on the Dimension 4550. Was able to change the WakeOnLAN setting to

"6 = Enabled for all NICs" with DCCU. The WOL Method was already on Magic Packet and is not changeable anyway in this PC. (Windows XP WOL settings don't matter either apparently) 

 Unfortunately to no avail with this PC. I did notice that now the LED on the back of the Ethernet card which was always ON with the PC off but with power cord plugged in, is now off when the PC is off. Setting the WakeOn LAN selection backt to "unsupported" or "disabled" does not make any difference. I suspect that this is a bad omen for WOL. It does not appear to effect the proper functioning of the integrated Ehternet connection though.

I keep reading that it should be possible to wake this PC from "Stand-by" (S3 state?) mode with WOL. I have never succeeded with this either with this 4550.

It would be interesting to try a PCI 2.2 ethernet card now the BIOS has the "right" settings. I have some PCI 2.1 cards but the Dell board has no cable connection.

I have to try your advice on my other Dimension 8300. But this has to wait as it resides in another not so close location :-(

Thanks again for pointing out an interesting and useful tool!

I experienced the same WOL problems with several Dimension types.
2300, 2350, 3000, 4500, 4550, 4600
Some types have no problems out of the box. 2200, 2400.

Krikkit_war delivered the golden tip.
I have tried it on the 4550 and it works perfect now.
On the 4100, DCCU reports WOL not supported.
I still have to test the others.