Hey guys,
i want to buy a new PC, but I want install Windows and OSX on my PC, I want to Run OSX perfectly, wich Motherboard and other Components I can buy? Can anyone give me TIPS?

Motherboard : ASUS / GIGABYTE / MSI (I like Asus more then others)
Processor : Core2Quad (Sockel 775)
VideoCard : Nvidia Geforce 9800 / x260/x280 (I think this make not Problems)
Sound : onBoard (Mic in is Importand for me)
Lan : onBoard
WiFi : No
RAM : DDR-2-800/1066
HDD : S-ATA
and IDE Controller for CD/DVD-Rom

The Question is only wich kind of Motherboard are perfecty Run on OSX 10.5.x ?

I doesnt give more than 200 (EURO) for the mobo

I hope i become some Help

SameX

I highly recommend getting an SATA DVD drive. The IDE drives can cause some extra hassle during installs. ASUS makes great boards. I prefer them to Gigabyte. However, it is tough to find an good ASUS board to work with OSX. Most of the boards are compatible, however, many new ASUS boards need bios mods. I have both an Asus board and a Gigabyte board running OSX. They both work equally as well. However, the gigabyte board was easier to configure. Also I feel the Asus board is laid out better, and the Support from ASUS has been top notch over the years. I cannot tell you how many times ASUS has let me RMA stuff that they probably should not have. Then again, I have purchased thousands of boards from them through my old job.
Personally I recommend that you go with Gigabyte, not that it is a superior product, but that there is a ton of support their boards in the OSX86 community. Much more so than ASUS.

I would have to agree, Im using ASUS P5GC/1333
Cheers
AP

Wich Chipset are better? nForce or the from Intel?
I have use only Athlon PC´s with nForce Chipset´s in my life, but because the Quad technology I want to buy an Intel PC
Wich of Intel Chipsets are better? Pxx ? Xxx ? (X48 in Example) etc. I dont know...

very Importand is a full functionally Sound, output and Input

I have found a 200 Euro MoBo :

GigaByte GA-X48-DS4

Sound : Realtek ALC889A
LAN : Realtek RTL8111C
Chipset : x48

It´s this good?

Avoid nforce/nvidia chipsets at all costs.

The X48 boards are great. You will need to do your research on install methods. The P45s are nice too. I have been a big fan of the GA-EP45-DS3R as it has firewire and supports 16GB of RAM. It all depends what you are looking to get out of it. I do not see the Advantages of the X series boards yet for what I do. I am still running DDR2 and use only one graphics card.

What are the better MoBo ? now the GA-EP45-DS3R / or / GA-X48-DS4 ?

I think i dont use more than 8 GB Memory in the Future, i have DDR2-800 4-GB , but I think i buy a Second Graphic Card in the Future(SLI).

How are the Sound Card of them ALC889/A ? I have Searched in this Forum, some says its works Out of the Box , some says you must be Install HDAinject/Patcher and some people become this SoundCard not to use...

Can I use the MICROPHONE in on ALC889A?

Sound is easy in 889A, there were some issues before with people sending out incomplete Kext files. But they are resolved now. I personally do not see the point of going to the X series. The P45 run well. But someone else here might have a different opinion. BTW I do not the the X series supports SLI does it? I thought it was crossfire only.

Crossfire? This are possible, i look to other MoBo´s then with SLI and P45 , thanks for any Answers I have now better know how about this things, thanks...

Edit\\ Ah now I see that, only nForce Chipsets are compatible with SLI or not?

I think SLI is only available with NVIDIA Chipset boards. I would highly recommend going with an Intel chipset on the board.

If you want guaranteed working mic/line-in then get a Griffin iMic it is fairy cheap you can find them refurbished under $20 on Ebay.