No client OS is supported on any Dell server.  That doesn't mean it won't work - simply that Dell will not provide drivers, nor will they attempt to solve any issues you encounter in doing so - or afterwards.   To install Windows 8, you will need to be using the 64-bit version, and you will need to try the Server 2008R2 driver: ftp.dell.com/.../LSI-LOGIC_MULTI-DEVICE_A00_R227150.exe Download and run to extract the contents first, then put them on floppy, CD, or USB. If you need to install the 32-bit version, then you can try the 2008x86 driver, but the further you get from a supported OS, the less likely you will be successful. LSI never supported Windows beyond Server 2003/XP, so you won't find any help from them ... drivers beyond 2003 were supplied only by Dell.
I'm looking for a Windows 8 driver for a PowerEdge 2850,  that has a PERC 4e/Di MegaRAID controller. (a LSI Logic OEM product) It run's fine, and is used with RH currently.  Trying to set-up a dual-boot,  with Windows 8 for testing/development. I experimented with LSI's drivers,  and some old Windows 2000 drivers ... no luck. Does anyone know what LSI legacy controller this OEM version is closest to ? And hope for an unsupported version (maybe) ? Thanks      
PERC 4e/Di driver