Here is my build that is getting a modest 9 masterverb pro on the test (nothing else in project and@48k):
Asrock X79 Extreme6
i7 3930k @ 4.2ghz, HT disabled, will soon be testing with ht on
32gb gskill trident (asrock approved) @ 1833ghz, higher and the mb wouldnt post even though they are 2400ghz (perhaps cause they run at 1.65v)
gigabyte radeon 7750 plus 5450 silent, to give 4 monitors, soon to be just the 7750 with amd approved active mini dp to dvi adapters (tried others to no avail)
win8 x64, scope 5.1 x64, scope pro 15dsp + 6dsp (dated 2003) both running 24 ADAT i/o, slot 1+2 of VV
VirtuVia 4 slot ATX PCIe to PCI expansion board, old p4 case, 300w PSU, PCIe card in PCIe slot 4 (16x, end slot) after much trial and error. Other slots gave 4 masterverbs.
Running the ULLI on 2nd fastest setting no pops. Happily running Protools 10.3.5, Reaper 4.402, Live 8.4, VEPro on other pc farms (ie heavy lan use)
I'm stoked that I have the scope cards running on pcie and can move forward with modern systems. Onward scope!! The Asrock mb does have 2 pci slots which I was running the cards on for a while but it was just too touchy and pci performance was low. 3 or 4 masterverbs. In hindsight I would buy a gigabyte or asus pure pcie mb and use my vv.
I couldnt wait for Haswell because I had to continue a big surround project that was having performance problems on my old GA P35C DS3R/e6600/win8x64/scope5.1x64 system.
Regards
Successful LGA 2011 w/virtuvia pci expasion
Re: Successful LGA 2011 w/virtuvia pci expasion
cooooL bro.. im really interested to do the same configuration 
Q. how about 64GB memory
Q. how much power that it require? which power supper you're using?
Q. i want to install: 1 powercore-6000 (400firewire)/ 1 Duende/pcie/ 1 scope 6dsp pci .... do you think all this will run ..
Q. whats the difference between X79 Extreme9 and 6?
my current setup is: intel_dp35/xp/4gb/ and all 3 cards are running ok.
virtuvia pci expansion looks promising
does all this pcie slots has its own IRQ's?
thanks
Q. how about 64GB memory
Q. how much power that it require? which power supper you're using?
Q. i want to install: 1 powercore-6000 (400firewire)/ 1 Duende/pcie/ 1 scope 6dsp pci .... do you think all this will run ..
Q. whats the difference between X79 Extreme9 and 6?
my current setup is: intel_dp35/xp/4gb/ and all 3 cards are running ok.
virtuvia pci expansion looks promising
does all this pcie slots has its own IRQ's?
thanks
Re: Successful LGA 2011 w/virtuvia pci expasion
can you install a pcie 2.0 x1 card into PCIE 3.0 x16 slots ?... like duende pcie 1x card....
Re: Successful LGA 2011 w/virtuvia pci expasion
the current cheaper x79 boards can take 64gb ram but I don't think you should try and use more than 4 sticks of any ram that runs at 1.65v. if they run at 1.35v then it should be alright. going on what scott at ask says at gearslutz.
if it is a supermocro or expensive sever board then higher voltage ram should be alright. with 8 sticks.
i would use a 550w psu because of the FireWire.
afaik. pcie versions and slots are all compatible. they adjust to the lowest denominator if they physically fit. a smaller 1x fits in a 16x slot.
in my case it certainly worked. I would recommend. a virtuvia atx but not their boxes.
get a fully pcie mother. board though and avoid extra bridging.
I think it was the motherboard that stopped me from getting more master verbs not the vv
if it is a supermocro or expensive sever board then higher voltage ram should be alright. with 8 sticks.
i would use a 550w psu because of the FireWire.
afaik. pcie versions and slots are all compatible. they adjust to the lowest denominator if they physically fit. a smaller 1x fits in a 16x slot.
in my case it certainly worked. I would recommend. a virtuvia atx but not their boxes.
get a fully pcie mother. board though and avoid extra bridging.
I think it was the motherboard that stopped me from getting more master verbs not the vv