I went up to 4.7 but could not push it more as ambients are high and could also have hit a wall, I dont know.
Anyway 20k plus tax is a good offer. Max to max he will make u wait for 2 days after which you can ask for your money back, though he is difficult to deal with.
BTW, am using the new Trident X 8 GB kit with a M5G board.