Cards use Samsung memory modules, which can easily clock up to 1800mhz and more.
Memory and GPU voltage are both adjustable in MSI Afterburner.
Solid cards only 2 months old. Never pushed to limits. Running silent and economic profiles with 960/1500 1.0v.
Also selling rock solid and beautiful cased crypto miner --- 1100€. (holds 4x revision1 cards)
Pictures here:
https://bitcointalksearch.org/topic/--7216
Inside handmade aluminium case:
4x VTX R9-280x
LEPA G1000
AMD A4-4000
Gigabyte F2A88X-D3H
2GB DDR3.
Bitfenix 230mm fans.
TP-Link 150Mbs Wifi.
Posting inside EU. Buyer pays delivery charge.
Accepting BTC, MINT, LTC, BC, WDC payments.