flungo

As I wrote in a YouTube comment and as others have mentioned you should not be setting the default gateway on the IB network.
 
 
It's not only not "best-practice" but will cause networking problems. I am not actually sure how you can still access the rest of the network with both PCs having the lowest metric route being via each other, but I am sure its some RFC breaking Windows magic if it does work.
 
If you communicate between the two machines using their IPoIB addresses then you just don't set the default gateway or touch any metrics and it will work.
 
If you want to be able use their LAN IP addresses and have it routed over IB (or just not worry about what IP is discovered using Windows's automatic discovery), then that's also possible. Again, don't set the default gateway or touch any metrics. Give the two machines static IPs (either manually or via DHCP). Add persistent routes between the machines for their respective LAN IP addresses.
 
Based on your example configuration and a Google search, using an Administrator Command Prompt, if we assume that the LAN IP for the NAS and Gaming PC are 192.168.0.20 and 192.168.0.21 respectively:
On the NAS-PC (192.168.0.20/192.168.1.20) run "route -p add 192.168.0.21 255.255.255.255 192.168.1.21" On the Gaming-PC (192.168.0.21/192.168.1.21) run "route -p add 192.168.0.20 255.255.255.255 192.168.1.20" This may be possible through the Windows GUI but again, I do not use Windows so cannot confirm this.
 
In my opinion, the configuration you have given is fundamentally flawed, does not achieve what it sets out to do and is misinforming people who do not understand how networking, routing and IP work. I hope you can take this feedback, test it and make the appropriate corrections.

The 8/10 encoding is actually the correct reason for it showing as 32Gbps. The 8 lanes of PCIe 2.0 were chosen based on the fact that 32Gbps is the actual data rate rather than 40Gbps which is the transfer rate. Infiniband is advertised using its "signalling rate" rather than its throughput. What is going on is that IB uses 10 bits for each 8 bits of data, for the reasons and details about this, see 8b/10b encoding on Wikipedia. PCIe and ethernet also use similar encodings but the speeds you typically see advertised are the throughput and not the signalling rate.

When you are configuring the IP settings for the two InfiniBand NICs, you set the default gateway even though you were already connected to your primary network with another NIC.
 
Windows gave a warning, and its an important warning! This could cause weird and unusual network connectivity for that computer, as it will have two "defaults" to choose from.
 
The way to fix this is just leave default gateway blank on the InfiniBand NICs. The two computers should still communicate fine without a gateway, just as long as they're on the same subnet.
 
This is at least the case with Ethernet based networking. I doubt its much different for InfiniBand (its still TCP/IP).

Nice guide
 
I only want to mention, it isn't best practice to add a gateway when there is none. A gateway is a way to communicate with another network. In this specific case, as there is no network, there is no need to put one in the config. 
 
Also, was there any option for jumbo frame / MTU ajustment with that kind of adapter to see greater speed?
 
Thanks!

xcase.co.uk deliver internationally, might be pricy shipping though

I have a triple monitor one, and it works fine. I wouldn't worry about balance, as long as the specs on the one you go for supports the weight and size of your monitors (with a bit of leeway). I have one with a counterbalanced base which is just a heavy metal plate. For college, the clamping one might not be possible and the ones with the base will work on any desk that is large enough, so for your situation, I would go for that. For a permanent installation, the clamp one might be better.
 
You should really have a problem as most of these stands are designed to support older monitors which were much heavier.
 
This is what I have but it's from a UK company. https://www.scan.co.uk/products/scanfx-ts734a-triple-monitor-stand-for-15-24-monitors-with-height-tilt-pivot-and-swivel-vesa-100mm-a I doubt they actually manufacture this though, so you should be able to find it or similar elsewhere: but as I say, so long as the surpass your monitor size and weight you will have no problems whatever you get.

for simple stuff like copy files or read certain values, it is just plain batch. If you need to be able to do very deep Windows stuff, it will be Powershell

I can make the most useful program in 1 line. Remove all white spaces ^-^. 

I did forget to mention that in my last post, which I was meant to: when setting it up, get someone to help you. Particularly for a 2 monitor setup. With the 3 monitor one, I have extra weight in the middle and although attaching the outer monitors with 2 hands is hard, it is possible. With two monitors, as soon as you attach the first it will become unbalanced. You will need someone to hold that monitor from pulling it down to the table while attaching the second. Once both are attached, it should have lateral balancing.
 
This probably won't be a problem with the clamp one, but not all desks are going to accommodate it and I would be cautious with any of these. If your accommodation has a fitted desk or has a desk with a weird design you might not be able to fit it, which is why I would recommend non-clamping for non-permanent installation.
 
Not sure if it's really an issue, but if the desk is one of those hollow ones (with paper honeycomb inside), the clamp surface area is small and so it might apply a lot of pressure on one point and damage the table.