Alright, so im going to buy a new motherboard for 2 purposes - PCI-E graphics card, and more expansion slots for memory since i only have 2 right now.

Im not going to buy a new CPU. From what ive learned that means i have to buy some OLD socket 478 motherboard, cause every motherboard type houses a different CPU. What i wanted to do, is buy a motherboard that can house my P4 3.0ghz CPU and in the future if i decide to expand, a dual core Intel CPU, now i know i cant (right?).

Note: http://www.asus.com/products.aspx?l1=3&l2=12&l3=42&model=199&modelmenu=1

Now, i want a motherboard that will maintain all my current stuff:
- DDR 400, 512m ram x 2
- IDE, 80 GB HD
- Socket 478, P4 CPU (w/HT)
- 2 optical disk drives (CD+RW, DVD-ROM)
- TV card (PCI)
And, let me:
- Install ANOTHER 200-250 GB HD (IDE/SATA)
- Add a 7800 GTX graphics card (PCI-E)
- Add another 512m ram (DDR/DDR2)
- Add another optical DVD+RW drive

So, is it possible for a motherboard to support DDR and DDR2 and dual-channel and NON dual-channel memory? Could there be a (double socket?) motherboard wich will let me add a 478/775 (or whatever) CPU?
So basicly i want to add and not remove. THNX for any help!There's a lot of motherboards that can house DDR1 and DDR2 memory.

I digged a little deeper and found the following:

http://www.asrock.com/product/P4%20Combo.htm

This is all nice and beautiful, but...

Problems. This board only supports DDR1 and AGP.

So, you can use all your old stuff, uncluding your graphics card.

You will not be able to use DDR2 memory or a PCI express graphics card.

I seriously doubt that you'll find that specific board you're looking for.

Maybe someone with more knowledge knows of such a board?
Ok, after over 3 hours of searching google, i fianlly found a motherboard - http://www.asrock.com/product/P4Dual-880Pro.htm
and http://www.albatron.com.tw/english/it/mb/specification.asp?pro_id=160

Man! Getting a new graphics card is insane. Anyway, so i cant buy the 7800 GS because im not a sucker (Nvidia took a 7800 GTX made it slower, priced it the same and called it the 7800 GS, yes they suck). So i want the 7800 GTX, meaning i need PCI-E. Making me think i need it all the more, is that i think that i have no more IDE slots to put a new HD in, so i want have place to put any games making any card i buy worthless. To add to that is that i think that i would want to add another 500mb or ram at some point so i need 4 slots other then 2.

But then i start thinking, if im not changing my CPU, why change my RAM? It would be so much more simple if i could just get a 775 CPU right now. So look at what ive gotten to from wanting to buy a simple card. So.. Can i borrow 1000$?1000$, that would be R7330 from me. With that much money I can buy a beast of a machine.

I told you upgrading is not easy.

All the best I had the Same Dilemma as you are having now, it wasn't as old a CPU mind you, (well OK actually my Second computer is using an old P4,) but my Current System is an AMD64 754 , and well it kinda sucks , but i could buy a PCI-EX Mobo to take that CPU but then i cant Get DDR2 ram (Funny story In a show of spite my Roomie went and got upgrade for his computer also but it blew up in his face when he put in the wrong ram Ouch) so since i cant get new ram , i decide to go stupid and buy a whole new system for 1700 UNITS of moneys. Ive not got it yet , but its like this

AM264 4600 X2
MSI NEO Platinum Mobo
Gefroce 7950GX2
Segate Baracuda7200rpm 320Gig
Big Expensive Case
550watt Power

And that my solution to your problem , Happy = Moneys!Are u *censored* kidding? 7950 GX2 ??
Ok, thats it. Im going to insist that one of u "lend" me 1000$. By "lend" i OF COURSE mean that i wont pay u back.That computer was a treat to my self , for Saving on The SSIA in Ireland, it was a 5 year savings Scheme where you got 25% bonus on your moneys , and also i got a proper Full time job where i get moneys every month and because I'm so Frugal with my money i can afford to every now and again just drop a load of ityour going to have to go with atleast a socket 775 board to get that kinda hardware man... i have never seen socket 478 with pci-eQuote

your going to have to go with atleast a socket 775 board to get that kinda hardware man... i have never seen socket 478 with pci-e