Modification really wasn't that bad. I ended up using a pair of tin snips, a loose hack saw blade and some 100 grit sand paper. Probably should have sanded the edges a little more. I am considering the alternative of blasting the corners with a heat gun near their melting point to really smooth them down, but not sure if that would be wise. This would be easier to do if you had a Dremel or oscillating saw.<br /><br />I did notice after reviewing the footage the card was running hotter than without the shroud. I suspect this is because of two reasons. One: The airflow wasn't being restricted and diverted by the shroud. Two: The fans were running faster in the first video because the cover wasn't attached properly.<br /><br />It probably isn't nice on them but these Tesla M40 cards seem to be able to handle being constantly near 90 C with no crashing. My Tesla M40 in my main server has been grinding away running Folding at Home under a heavy load all winter now. It has been stable at 87 C at stock fan speeds.<br /><br />I suspect the R520 would perform better with a blower style card like a NVIDIA 1080 TI FE or a Quadro P6000.<br /><br />eBay link to my power cable I use and sell:<br /><a href="https://www.ebay.com/sch/i.html?_dkr=1&iconV2Request=true&_blrs=recall_filtering&_ssn=professionalrecycling402&_oac=1&_nkw=tesla" target="_blank" rel="nofollow">https://www.ebay.com/sch/i.html?_dkr=1&iconV2Request=true&_blrs=recall_filtering&_ssn=professionalrecycling402&_oac=1&_nkw=tesla</a><br /><br />Video of me discussing the caveats of using a powered GPU in the R520:<br /><a href="https://youtu.be/qYZGGF9ZNrg" target="_blank" rel="nofollow">https://youtu.be/qYZGGF9ZNrg</a><br /><br />0:00 Intro<br />0:51 Cutting inner fan shroud nubs off<br />3:14 Cutting a path to run the power cable<br />4:49 Expanding the opening for GPU airflow<br />8:41 Tesla M40 GPU installation process<br />10:48 Testing the card under load<br />...<br /><a href="https://www.youtube.com/watch?v=dDwEumOflAE" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=dDwEumOflAE</a>