[maaku]

Uh, using what hardware? The 980 Ti is about 11 TFLOP in half-precision (apples to apples). So 16x 980 Ti cards would take up twice as much rack space for $11k. Your estimate (and NVIDIA's pricing) is off by more than an order of magnitude...

[mon_insider]

A 980 Ti doesn't have FP16 hardware. The only Maxwell based component with such support is their Tegra part.

[wmf]

Isn't the ECC tax around 10x?

[marshray]

So, just do the computation twice and compare the results?

OK, so there's twice the power to pay for but it seems like at $129k acquisition cost per 3.2KW consumption you could run for tens of years before break-even.