1. compute unit in CGN 1.3(RX 480) is more efficient the same in CGN 1.1 (R9 390) on 15% mostly because of the prefetch and cashing.
2. RX 480 has direct acces to ISA, but you should write you code on lower levels to take advantage from that
3. in games RX 480 is able to compensate brute force of the CGN1.1 by optimizations in geometry units like excluding the poligons of the zero sizes, because of the new index cash end etc.

So the question is can we get same +15% in math tasks if we use high level languages? I thinks its hard to achive if its possible at all. Cahes and prefecth are not able to give big advantage, and maybe only low level direct access can give something, but then you have to write special version just for RX470/480 cards.

But again, RX480 are very good from power point of view. I can take 190-195H/s with 0.95-0.975V voltages if i dont care about power costs, and 180H/s with 0.92V!,temps below 60C if I need power efficiency. Also you can use cheaper PSU for the rigs with RX480.

And again, I wouldn expect that RX480 will perfom close to 390X, till someone will start to develop special miner for RX480

v8 -i 5

GPU #0: Ellesmere, 4096 MB available, 36 compute units
GPU #1: Ellesmere, 4096 MB available, 36 compute units
ZEC - Total Speed: 387.347 H/s, Total Shares: 21386, Rejected: 294, Time: 37:56
ZEC: GPU0 193.353 H/s, GPU1 193.995 H/s

MSI RX480 Gaming X 4Gb undervolted
GPU 1250 Vout 0.96V
Mem 1900 (timings from 1500) 0.975V

Both cards in pc box, stable as rock
GPU0 temp/VRM: 68/74 C
GPU1 temp/VRM: 62/66 C

1300/2000 clocks doesnt give too much boost, but will req Gpu 1V/Mem 1.2V, and temps goes to 70-75C.

LTCGear has not so many people, so sometimes it takes time to get answer from them. Right now I think they have manually to go through each order + fix all dual-mode share conversions, and it is a lot of work.

I had problem with dual-mode, and didnt write a ticket about that, but missed shares were added to my account. Had one more case, where LTCGear were making decision in my favor, so from my experience with LTCGear, even if multiplication will happen before your orders will be credited, you will be compensated after some time. But I think they will try to fix all before multiplication, so maybe we will have 2-3 day delay in multiplication.... bad thing about that is that this Friday payout could be without multiplication.

So I suggest you to start worry only if you problem wont be solved till next Friday, before that time just relax  

But he has mistake. Zen gives 0.00061, and he wrote 0.0061. 10 time mistake

P.S. Also he forgets to deduct service charges