750Ti can mine Monero at a very low hashrate, but it is quite power efficient. Probably capable of some other algorithms too, although at low speeds.
If you want a new piece of hardware, just get a small x86 rackmount (with Atom or Celeron is okay) and use something like VyOS (
https://vyos.io/) or PFSense (
https://www.pfsense.org/) - it will be able to handle much more traffic than an 18xx ISR as well as many more features. Supermicro makes some good cheap barebones machines with Atom CPU in a quarter-depth 1U, about the same size as 18xx ISR.
Hi ... Again

Well, now things are gertting better

I installed this GIT'ed CUDA 10 and suddenly my drivers GUI (TWEAK Bragging stuff) worked again. I did install CUDA earlier on, but this from inhere (link down below) bade a difference. Still, the GTX770 would take, but 750ti was OK i think. Look beneath. I still dont get it, 770 is more powerfull, but 750ti is a newer card though.
Look here...
https://bitcointalk.org/index.php?topic=1433925.0More comming..... processing

Sorry, it wasn't GIT'ed, its from inhere - But this is the CUDA 10 I installed just to see what this could do... Haven't tried the "nhm_windows_2.0.3.0.exe" yet... :
https://mega.nz/#F!O4YA2JgD!n2b4iSHQDruEsYUvTQP5_wI especially like the words appearing "Mining with High Intensity"

This was what had changed compered to the other cards:
http://drah.dk/onlineimages/WhatNot04.jpgAnd here's some positive feedback:
http://drah.dk/onlineimages/WhatNot05.jpghttp://drah.dk/onlineimages/WhatNot06.jpgWhat say you Sire

OK, it's done... let's see what happens next... Trying the installled version of nicehash first then the one I found and the maybe we should try that LEGACY thingy...
Please notice that this windows tweak thing, it's possible to change card config there. Clock etc... And I've been hearing much about that. Not that I'm going to beat my card in any way. All my Linux rigs, the ones I buiuld for SETI etc., those I've been setting up with a lot of testing in advance, shellscripts I did which checked coretemps on CPU's but GPU's as well, and if one was high, I got a warning. If one or more was to high I got a warning, it went to a log and then the system shutdown... Using CUDA on Linux, the Ubunutu distro anyway, made the nvidia tool nvidia-smi go bananas.... only a simple readout of temp was possible, so I fitted some scripts

Well, enough talk here... lets try it out
http://drah.dk/onlineimages/WhatNot07.jpgKR
Dan