Used, Tested, and Working! $70 each, $320 for all 5. 

Tested with Unigine Valley Benchmark 1.0 and runs well with consistent performance.

Base Clock: 1127 MHz

Boost Clock: 1216 MHz

Memory Size: 4 GB

Bus Interface: PCIe 3.0 x16

Power Connectors: 2x 6-pin

Outputs: 1x DVI, 1x HDMI 2.0, 3x DisplayPort 1.2

Suggested PSU: 500 Watt or greater power supply recommended.