I'm aware of plenty of options like Boot Camp and Parallels that allow you to run Windows on a Mac, but can you remove OS X and run only Windows on new Mac Intel based hardware?
"Yes, you can have only Windows installed, but there are some other things to be aware of:
Leopard and Snow Leopard
To have full hardware support, you will need a copy of OS X Leopard or preferably Snow Leopard since Snow Leopard has a newer version of the Boot Camp drivers and device software. When you are booted into Windows and insert the OS X disc, you will be prompted to install the Boot Camp drivers and utilities. These Boot Camp drivers are used for things like the Apple keyboards, trackpads, mice, special function keys for brightness, etc. to function in Windows. You can download a version of the Boot Camp drivers from Apple's website, but it is only an update and doesn't include the full suite of drivers and device software. Since the full Boot Camp software is on the OS X disc, you will need a copy of the OS X on-hand, but you don't have to have to keep OS X installed.
Lion and Mountain Lion
Since there is no longer any retail disc, Boot Camp drivers can be download in OS X by running the Boot Camp Assistant utility in Applications -> Utilities -> Boot Camp Assistant. This does mean you will need an installation of OS X at least while you download the drivers and then burn them to disc or copy them to a USB drive.
Firmware Notes
If you are installing Windows on an older Mac, you might need a temporary installation of OS X to update the EFI firmware to allow BIOS emulation which is needed to boot Windows. If you do need to update the firmware, you can wipe off OS X after it is updated.
Some newer versions of Windows such as Vista SP1 and 7 have a EFI boot mode, but Microsoft's EFI boot code is not compatible with Apple's EFI. This effectively means BIOS emulation is necessary to boot Windows, however this BIOS compatibility is in the computer's firmware and does not require an OS X installation in order to function. Also, you can safely format the hard drive as MBR-only if you want only Windows (and/or Linux) installed. If you are also running OS X along with Windows, you would want to be using a GPT/MBR hybrid partition format."
"You CAN just install Windows. Either from using the BootCamp assistant (Apps>Utilities>BootCamp) or simply by holding down OPTION (ALT) or ""C"" (for CD-boot) on the keyboard during boot up with the Windows disc in. Once the Windows Installation process starts, choose Custom, Delete ALL partitions, Choose New for the Windows Partition and click Next. Voila! It's that easy.
No need to run Disk Utility. You can edit the partitions from the Custom Windows Install. I was worried if you only had the Windows partition that it might not boot up but this isn't the case. It's works great with just the Windows Partition and the Windows ""System"" allocated space.
Windows 7 runs amazing on my Mac Mini 2,1.
After installing Windows, ensure to put the Mac OS X install disc in as this will install all the necessary Windows drivers (video card, track-pad, etc) for it run at its max potential.
If you do not have the Mac OS X disc, no worries. You can d/l the drivers from the BootCamp Assistant (Go>Utilities>BootCamp) or from the Apple web site."
