Not to worry, but it looks like the coders for the big mining operations with AMD GPU have mastered Lyra2 algo and are now hitting 2mhs on 280x.

Do you have more evidence?

Yeah, I show you some maths evidence:

We will use current difficulty of 101 and not the peak of 132, because large mining organisations can arrange sufficient GPU's are mining a coin so it less profitable, yet profitable to them on their Bios mods and modded software. They can build up huge positions - small miners will simply switch to other algo coins on profitability.

CCminer 750Ti Lyra2 output is 740KHs.

Woking out profitability calculation is: 1000 divided by (Difficulty divided by 1000) times block ratio (block reward divided by 50) = coins yield per 1ghs of hashpower in 24 hours. Coin yield per 1ghs times current price (0.00004BTC) = profitability number for comparison purposes. 1GHs profitability times 0.00074 (740KHs) = your earnings per 1 750TI

1000 / 0.101 x 1 =9900VTC.

9900VTC x 0.00004 = 0.396BTC earned on 1GHs Lyra2 hashpower

0.396 x 0.00074 = 0.00029304BTC or $0.07 you earning on 1 card per 241 hours

To compare this to X11 profitability, we need to convert into X11 profitability

750TI X11 output is 3200KHs

Calculation is

Lyra2 haspower divided X11 haspower = ratio of difference.

Ratio of difference times profitability number for comparison purposes = X11 profitability

740 / 3400 = 0.23125

0.396 x 0.23125 = 0.091575BTC X11 equivalent

What is Darkcoin profitability:

7 day average difficulty of blocks found at miningpoolhub is 4120

1000 / 4.120 x 0.0682 = 16.55DRK

16.55 x 0.019 = 0.31BTC

0.31 x 0.0032 = 0.000992BTC or $0.25 on a single 750TI

So, VTC profitbility on CCminer converted into X11 profitability is 0.09157BTC and Dash (DRK) is 0.31BTC. Therefore, CCminer owners will have switched to other more profitable algo coins.

This leaves sgminer (official version) of sgminer is:

800khs on a 280x = 0.0003168BTC or $0.08

X11 output is 6mhs on 280x = 0.00186BTC or $0.465

So, small miners will not be mining Lyra2 VTC. They will mine another coin and then swap it for VTC.

This leaves the large mining operations using AMD GPU's. They have their own modded bios for GPU's and coders to mod software or write their own mining software. So, the question is: How much have they squeezed out of sgminer?

On Neoscrypt, Wolf0 has recoded it to squeeze an extra 90% e.g. 325KHs has increased to 590KHs, a 81% increase on the official SGminer.

Wolf0, is part-time coder, the large mining organisations can hire coders on a full-time basis or there owner is a coders, until every performance gain has been squeezed out of mining software.

Therefore, a large mining organisation can be achieving double or more hash output per a card then a small miner. They can use this to build huge positions in coins over years via selling the coin down to get rid of smaller miners and when a block halving happens, they control of large proportion and can set the new market price making decent profits.

This applies only to GPU mining and not ASIC mining, with ASIC mining the manufacturers of the equipment pay for mining software development. Therefore, little can be squeezed out of this equipment via software modding.

AMD got $59 million in GPU sales over the past 3 years and made about $5.9 million plus in profits from crypto currencies and spent $0 on developing mining software for their cards.

Nvidia got $7 million in GPU sales in the last year, but has spent $0 on developing mining software for their cards.

This is why GPU mining is more better proposition for the large mining operations; they are the only people funding optimizations in software for mining these algorithms. But, it is so much more strategic and require patience wait 1 year or more. Therefore, not something the less talented or impatient businessmen get involved in.