"HPC Node" on a Budget

Hi all,

I'm looking to build a high-performance workstation PC for a variety of workloads, including deep learning, RTL synthesis and simulation, and SystemC simulation. This machine will not be used for gaming whatsoever - I've thrown in a GT 610 just so I can pull up a terminal. All parts will be purchased in the US, and I'd like to keep the total cost under $2k, so I'm primarily buying used parts off of eBay.

At this point, I've narrowed things down to a semi-final list (no PCPP since it doesn't have several of these parts):

• Motherboard: Supermicro X9DRD-EF
• CPUs: 2x Intel Xeon E5-2697 v2
• CPU Coolers: 2x Cooler Master Hyper 212 Evo
• Display GPU: NVIDIA GT 610
• Compute GPUs: 2x NVIDIA Tesla K80
• RAM: 128GB (8x16GB) Registered ECC DDR3 1600MHz
• Boot Drive: Samsung 860 EVO 1TB
• Auxillary Drive: Seagate Barracuda 8TB
• Wifi: TP-Link WiFi 6 AX3000

You may notice a few things missing from this list - namely, a case and a power supply.

1. Given that the K80s each have a 300W TDP, and the E5-2697s each have a 130W TDP, I think a 1200W PSU should be adequate for this machine. But I'm having difficulty finding a PSU that has enough 8-pin EPS (CPU) connectors. The motherboard requires two, and an optional four-pin. But the K80s also use EPS connectors, rather than the usual PCIe. For those of you keeping count, that comes out to a total of four 8-pin EPS connectors! I know that some fully modular power supplies have interchangeable PCIe and EPS connectors; could I for instance get a Corsair HX1200 and some extra cables?

2. I could also use some advice on a case. I'd prefer something unobtrusive, inexpensive, and with good airflow. I'd love to get a 4U server case and mount it on its side, except I'm not sure if those can take a standard-size PSU. Regarding case cooling, Noctua fans are obviously the gold standard, but I'm also open to any other (less expensive) suggestions.

Other than that, let me know if I'm about to do anything blatantly wrong - this is my first time building anything more sophisticated than a standard gaming PC. I'm mildly concerned the 212 Evos won't be adequate, but that's probably just paranoia. I'm also not sure if there are any "gotchas" related to having two different types of GPU in a machine.