Need to upgrade my motherboard and was looking for recommendations for a reliable motherboard which will not split the x16 PCI-e 3.0 lanes down to x8 if there are more than one gpu attached.
Will have 4 GPUs to put in the system, 2 Tesla K20c, 1 GTX 680 and 1 GTX 780ti. Since the GTX 780ti is the fastest for integer calculations I will use linux->GTX 780ti for that work, and then use the K20s in Windows for MATLAB mex CUDA work(64 bit). To keep things simple probably will connect the video out the the GTX 680.
It will be a dual-boot Windows 7 x64 Ultimate with the other partition being Ubuntu 13.04. Will probably still use the same i-7 3.9 ghz CPU.
This machine will be for both computational work and (for relaxation) games, so not sure if the motherboards which are labeled as ‘server’ will be adequate.
Supposedly X99 (LGA 2011-3, DDR4 RAM) platform will come out perhaps late Q2 or Q3 of this year according to an Intel press release a few months back. Unless you need it immediately, maybe it makes sense to wait like sascha mentioned.
I was talking about a dual-boot system, sorry for the confusion. Given that I would only be able to put one CPU in the system I did not want to split the 40 PCI-E lanes 4 ways so just used 2 of the highest capability GPUs in the one box with an X99 motherboard.
Ended up with 2 dual-boot machines with 2 GPUs each, which has been sufficient for my work.