I sell my extra electricity at an higher cost than you would consider "too high to mine".
with cpu it's good that your only cost is the electric bill, the computer is not a cost, as you already use it for other purposes.
not sure exactly what you mean by that. you would mine even if your costs are higher than your reward?
I already mine
{1} occasionally at higher cost than what I get. I would probably need more than a 10x to just break even with operating costs.
You don't need to explain me how using my computer for other needs amortizes cost. The whole point of my miner is that it's fire and forget. I mined while playing
Qbeh-1{2} but for some more AAA action I'm currently mining
and playing
Borderlands 2{3}!
My current CPU is an AMD 450 X3. It does not seem to have the power consumption characteristics you mention. Besides, being passively cooled, I cannot run it full load for much time and I don't see any good reason for which anyone should buy more powerful stuff.
If a GPU miner can be made for this coin, then it's a good thing to make it, it simply exposes that this is not a cpu coin. Or if the performance advantage is not so big, then it will be a CPU/GPU coin.
GPUs have become proper turing-complete architectures about a decade ago therefore they can run everything a CPU can whatever they're efficient at this is another matter. Yescrypt is not compute-oriented and therefore won't be accelerated by compute-oriented architectures.
{1} Mostly MYR and DBG. Sometimes also Fresh and FTC for testing.
{2} Pretty sure it's some UDK build. Due to some unfortunate design decision, massive overdraw and fillrate. Shading is basically from the 90s so plenty of untapped power. Still a quite simple game. It's not buttersmooth but very playable.
{3} Unreal 3, targeting X360 I have been told. Still quite simple graphically, I am almost at max settings. Again, not buttersmooth but playable.