Hey guys,
 
I have exhausted my resources to find out about my specific "problem"  even Asus scratching their heads.
I know this might be in wrong section but anyone with higher level of knowledge ever came across similar situation can maybe confirm what I think might be the issue, although I might be way off
I have Asus x99 WS-E 10G board with 3x EVGA Titan Black and they are in slots 1, 3 and 5 all run at X16. Any benchmark or software application shows them all working as they should but.... going to BIOS only 2 of the GPU's slot 1,3 are detected and I have latterly did all I could e.g. downgrade BIOS, downgrade drivers, change PCIE GEN to 1,2 and 3, enabling 4G decoding, nothing changes.
 
Main GPU is  in slot 1 to ensure that slot  and GPU is working I plugged monitors DP to GPU #3 (PCIe #5) and loads screen no problem.
If anyone have any knowledge  beyond what I did, please share it.
 
My theory is that the BIOS itself might be at fault, Asus does not  emphasize enough on Workstations boards BIOS updates or I might be wrong and the M/B has issues
 
 

Thanks, but the troubleshooting is not related to the issue I'm having. The SLi is working. if I run any bench it utilizes all 3 cards 90-99% so no power distribution issue or GPU issues, all GPUs are showing in Device Manger.
Eventually I want to get single slot cards and get 6-7 of them to work. There are few that managed to get 7 GPUs on very similar board x99 WS-E 3.1 USB for Octane rendering and they had small initial issue beyond 5 cards but not with 3 as far is showing in BIOS.
I was trying to contact some of  the guys but so far no answer.
 
This is driving me insane
 
Thanks
 

Thanks. It shows 3 cards working fine  in Device Manager.
Ive had Workstation boards before but it seems that Asus is slacking even more now this days. There is only 4 BIOS releases for my M/B while for the same non 10G  3.1 USB M/B there are like 11 or 12 releases so far 
I figure that there might be BIOS issue

So the GPU that does NOT show in BIOS still displays an image?? That sounds like a cosmetic glitch in the BIOS, because the GPU would not display anything if it wasn't actually initialized by said BIOS. Have you benchmarked the system with two GPUs and compared it to benchmark data with all three GPUs installed?

 
Thanks
 
I actually didn't test it with 2 and 3 GPUs, but if there was an issue with the third card it would show how much power utilizes during tests and all cards run almost MAX speed.
 
BIOS issue (limitation/cosmetic) came to my mind as well
 
Forgot to mention. This board have SLI switch to help people to determine which slot to place GPUs (2 way and 3 way SLi) its off by default, if I switch to 2 way, switch is green if I switch to 3 way switch is orange, indication cards are in wrong slots but in fact they are in correct slots

Unfortunately I didn't test single GPU I would have to take everything apart I presume, but making that GPU primary by changing DP cable and assigning GEN 3 to that specific GPU loads it fine,its slightly slower on boot thou, but runs the same speed after all.
Its not real issue, but I wont pretend that I'm an expert and know everything, yes I'm probably more knowledgeable than average user, but there is always room to learn more and this is one of the things I got stomped upon and before I determine that this is not a real issue I want to hear from you guys, guys with more brain of knowledge.
You  pay $1100 for M/B you think they would provide better support
Thanks

AWK16
Unfortunately I didn't test single GPU I would have to take everything apart I presume, but making that GPU primary by changing DP cable and assigning GEN 3 to that specific GPU loads it fine,its slightly slower on boot thou, but runs the same speed after all.
Its not real issue, but I wont pretend that I'm an expert and know everything, yes I'm probably more knowledgeable than average user, but there is always room to learn more and this is one of the things I got stomped upon and before I determine that this is not a real issue I want to hear from you guys, guys with more brain of knowledge.
You  pay $1100 for M/B you think they would provide better support
Thanks

It's ASUS
Can you not disable the PCIe Slots to test with?

Not a big deal imo as long you're not having any performance issues.

 
I now, but that's my weakness I am so darn anal,  sometimes helps sometimes handicaps me

Got another response from person with exact setup. He said he can't even get into BIOS, it goes into constant loop, he sees everything in Windows but that's all....Wow, so I'm actually lucky.
 
 

I have 1 in use and 1 still brand new Rampage 4 Black that I will probably just keep in my cabinet for decoration but it was the same issue then ..... BIOS was darn old and they never bother updating and there were few unresolved issues.
I don't know whats up with Asus, they make such a nice and reliable products, but their support is just beyond unacceptable, at least it has been for the past 2-3 years.
 
When I got this WS 10G board I did a lot of research and because not many have this board I was doing my purchase based on the same WS but 3.1 version and review, there was no indication of any big issues except the USB problems that Asus ultimately  fixed it  with BIOS update.
 
I don't have major problems with my board but the fact that Asus have such a poor support, despite their nice product I'm going to consider different brand next time I'm looking for M/B, it boils down to customer support and support for the product itself and that refers to anything on our market today, not only computing.
 
 

Sajin
Maybe go with a gigabyte board next time. I had a problem that was related to the bios on my gigabyte board. Gigabyte sent me a tweaked bios within a few days after describing my problem to them. Problem solved. 

I will keep that in mind.
 
I used to favor GB boards, but I didn't like how they handled the X58 second gen boards with the very buggy Renesas USB 3 chips. Also had that same board develop some kind of dualBIOS conflict issue, didn't figure that one out until I flashed both the second BIOS and the broken main BIOS with the latest version. Came to find out the board had been booting from the backup BIOS (which was a very buggy launch day version that had some non-working features) and there was no indication it was doing so. Ironically it wasn't much later that I began noticing the major BIOS steppings begin automatically flashing both BIOS's.