Danielpt95,   From what I am seeing it looks like only a single server supports those specific processors and 4 GPU's, which would be the Poweredge R940xa.   Let me know if this helps.  
Hi Everyone,  I have been looking into Dell Servers which can handle 2 x Intel Xeon Gold 6252 CPU @ 2.1 GHz and 4 x Nvidia P100 GPUs. So far, I found that Dell Poweredge R740 can handle both the CPUs but only 3 of the mentioned GPUs as they are double-width GPUs. If anyone knows which server is compatible with 2 x mentioned Xeon Gold 6252 and 4 x NVidia P100, please inform me of the Server model. Thank you. Regards, Daniel
CPU and GPU compatibility - Dell Servers