There are none. Microsoft discontinued SCSI support as of 2012. Sometimes Windows 2008 R2 drivers may work, so you could try downloading Dell's 2008 R2 drivers and see if 2012 will accept those.  Another major note: The 2800/2850 does not support any processors with VT, so you won't be able to use this server for Hyper-V. At best you could run Virtual Server or a similar alternative like VMware Server or VirtualBox (but this may require downgrading the OS as I'm not sure 2012 R2 will allow installing any of these). If they do install, they'll be limited to running VMs with 32-bit OSes only. You'd need at least a 2900/2950 to have VT and have the ability to run x64 VMs. 
Hi We have numerous PE2800 servers which are still good but will not support Windows Server 2012 R2 due we believe to the presence of the PERC 4e/Di controller. So is it possible to disable the embedded PERC 4e/Di and install a PERC 5/6 PCIe card (Connecting it to the backplane) Has anyone done this already? Sorry if this has been ask before Thanks Simon
Can you upgrade a PowerEdge 2800 with a PERC 5 or 6 PCIe RAID controller ?