Searching for graphic cards / accelerator for Esxi 5.5 and HP DL 580 G7

hello together,

i used Google ad did not find what i am searching for.

we want to add 2 graphic cards to our HP DL 580 G7 Server for Special VMs.

We are running on this Server ESXI 5.5

Does anyone know which grpahic cards we can use ?

I found a page from vmware: VMware Compatibility Guide

and i found a page from nvidia with Nvidia Accelerators for HP Pro Liant Servers.

But - the mentioned accelerators in the web page (for example Tesla K40C) are not in this list.

Does anyone has grahic accelerators in this machine wiht ESXi and can tell me which one is working ?

Thanks !!!!!