I have that NIC and we did that testing already. Yes it enables the UEFI boot but it still reports an arch of 6 (EFI IA32) which isn't the correct value to for a true UEFI PXE boot. For example, during this testing, I had built a boot image capable of installing Windows to a GPT Disc. This same boot image works as expected from a UEFI boot CD. But even with using both the flashed CT (we also did the GT card also) it still actually did a BIOS based PXE boot. The consequence was that the OS installed properly but a BIOS booted WinPE cannot write the boot-sector to a UEFI enabled disk. We had gone through Quad for this issue as well and Intel had told us they did not currently have any product available that was capable of the proper UEFI PXE boot for this purpose, and to expect it in the next wave (7 series) products. However, during our testing, we ended up getting the "normal" BIOS type response from the PXE server. So our regular WDS boot menu worked as normal. I am not sure if we tried booting to the Linux server to see if it had worked or not. I have a topic in the Hardware Hangout when i was working on that project you can check out.