I live in a freezerbox so temp is not a problem. They are cheap, I can get them for $139. However do they draw noticable more power?
15-20w (which isn’t that noticable)
The point is better cooling and power delivery.
Since you live somewhere that’s cold and your electricity is cheap I don’t think it will be that bad 
They also draw more from the PCI-E slot being 6pin.
In % that is quite a bit.
Yes that’s the exact one. Startup parameters:
-zpsw x -allpools 1 -cclock 0 -mclock 1900 -i 1
Yep, the reference cards are cheap.
I don’t think the reference cards draw much more power? If they are using the same basic foundry process for the chips, I don’t see how it could vary that much. The cooling solutions are definitely better on the non-reference designs though. You also pay a premium on higher spec cards due to binning of the gpu/memory.
Custom PCBs make a big difference.
there’s a great benefit of refs - controlled airflow direction - I can feed a bunch of them on one cold intake 
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Are those Sapphire Ref RX470 4GB cards?
well to be honest not all of them…5 refs, 2 nitros and 2 asuses - all 470
Do you see the same performance on all of them?
yes more or less. running all on 850mv, 1500 straps.
some cards may misbehave a bit at 2000 mem, but 1950(ETH) or 1900(ZEC) works
if 470 drives display I up the voltages to ~900, otherwise BSOD or driver crash
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Been away and just updated from 2.0 to 4.0. Went from 42-45H/s to 70H/s on each of my two 480’s.
How? I have 380 4gb getting 42-45 wirg 990/1500 overclock (Gigabyte)
380’s are slow. (wadesfraADSDBTWH5EARSFD>x)
Claymore earned a few millions so he added nofee switch to miner 
I have switched my operating system to win 7 Ultimate from win 10 and now only 4 of my 6 graphic cards show up when I run the miner. I had everything working with win 10 with cards running at 50ish/s. Anyone have any idea why only 4 cards would be recognized on win 7 compared to win 10?
The XFX Tri X 470’s is about 10% more epxensive for me compared to ref.
They get about 2-3% better performance compared to Reference.
However they have quick replace fans, are cooler, and draw less power?
Might spend the extra 7% for that.
I think I read somewhere that Claymore’s zcash miner is not updating the linux version anymore.
Has anyone tried using any of the Claymore’s windows versions on Ubuntu using WINE? Does it work?
I feel like I’m getting left out of some speed improvements being stuck on version 1.1
I’m running 2 identical system each has:
2 - R9 295x2 cards
and a generic MB with a dual core 2.5ghz cpu and 4gb RAM
Attempts to cheat and remove dev fee will cause a bit slower mining speed (same as “-nofee 1”) though miner will show same hashrate.
Any idea of the difference of hashrate between nofee 0 and 1 ?
Check what the pool measures in both conditions.
5% less on nofee
2.5% less with fee