Those GPUs are too old to mine any coin effectively. Even with free power you would be earning less than $1 per month. Also, why are you switching to a Cisco 18xx ISR for a router? They're very underpowered (an 1841 can barely do 20Mbps NAT throughput without maxing CPU).
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Hi AstralEureka

Thanks my friend.... for helping us

We are being closed in by snow BTW

Well, I've got a GTX750ti as well (well, 8 or more I think), but this doesn't change anything, right?
Sorry for the late answer, I had an job to do this whole weekend.... I'm still building that cooler I refereed to earlier on. It'll be done this afternoon and the I hope to be able to solve the problem. I've tried the things we talked about. I need to find the one place in my config of the router, where I open all ports just to test this too. As we talked about I cant just "off" the whole shebang due to the DMZ setup. I couls shut everything down and reconfigure the router , but is this the thing to do now?
Well, to be honest I'm not sure what to get. There's a lot off different models in each series. I've written the firm i UK that I plan to buy it from.
You've read my little setup. What would you suggest? Budget max. 1000USD. Need to be RACK mountable

Prefer full width, not a kit
Need to be able to bake a "safe side" and a "unsafe" where the web-servers, name servers, SQL and mail
Regarding the 3Gb, I was referring to this reply:
Quote from: BitCryptex on January 18, 2019, 03:50:22 PM
Ethereum mining requires at least 3 GB of VRAM due to constantly growing DAG size. Unfortunately, you won't be able to mine Ethereum with those two cards. I haven't used the new NiceHash app but the older one allowed user to choose algorithm. You should be able to mine something else.