Yea the reject rate is high I agree, but I think that is somewhat due to middlecoin, and yea probably somewhat due to my overclocking.  

Just double checked my wattage (at the wall with a Belkin Conserve Insight), at idle it pulls around 100W, after ~15 minutes of mining it was pulling ~1170W. So it's not quite as high as I previously stated, but still a lot higher than yours @ 1070/3 which is 358W. That's on a 1200W gold rated PSU (http://www.coolermaster.com/powersupply/silent-pro-gold/silent-pro-gold-1200w/), which states a maximum of 90% efficiency, but that's 90% efficiency at 50% load...lol. So lets say it's at 87% efficiency (but realistically probably less) since it's > 90% load, which would estimate that each GPU actually using ~311W

With all that being said, in GPU-Z sensors section it states the 290 cards are only using 245W each, so basically in line with what you're saying


I do have my target temp set at 85*C, from the factory the cards are designed to run at up to 95*C so I figured 10*C under that should be plenty safe... And allows more power that would be going to the fans to keep it under 80*C to go to keeping the clocks from throttling and/or more stable at higher frequencies... At least that's my thoughts on it


I actually used to use the eu server myself even though I'm in the US because I got lower reject rates. Only recently switched back to the main server b/c it was stated on twitter that: "All pool servers are out of beta. http://Middlecoin.com  now points to your closest server." I just switched back to the eu server to see if it's still better