WDS PXE-E16 error when booting UEFI clients

 I'm really just hoping to save fellow techs some work here. I had no idea what was going on and found very little information on the search engines to guide me to resolution. Here's the short story:

 

 In preparation for increasing volume of Windows 8 sales, we've finally been pushed to the Microsoft approved method of deployment. Our previous imaging solution hasn't seen an upgrade in years. So, I've procured and installed a new Windows Server 2012 server (specifics are unnecessary since none of my trouble was hardware related). After installing Windows Server 2012 Standard (with Active Directory, DHS, DHCP, File and WDS roles), i found that while we could PXE boot BIOS systems, we could not PXE boot UEFI capable systems. We always received a PXE-E16 error (No offeres were received) at the client.

 

 I set various DHCP options, changed NIC drivers, checked DHCP and WDS logs, installed Network Monitor to trace packets, deleted DHCP options, checked DNS, etc.

 

 I finally changed the entire set of server hardware (we'd ordered a second system for backup). No change. Still no offers received while booting a UEFI compliant system which PXE booted BIOS mode perfectly.  

 

I've tried three different UEFI capable client systems, two based on the Asus P9X79 WS mainboard, one based on the P8Z77 WS; all boot BIOS normally and fail with the same error in UEFI mode. I can get into it later but i know that these systems will PXE boot UEFI without problem.

 

Thank you!