what are the s1 upgrade specs/price?
Bitmain have never said that it will be possible to upgrade the S1 so not sure why so many people think it will be.
It's still unknown what the upgrade path will be for S2's but it's likely to be just replacement blades, and it remains to be seen how good a deal it will be.
You won't be able to swap 10 blades with the ones from the S3 as the power consumption will be too high, so it's either going to be different blades with underclocked chips or fewer blades say 4 to match the 1000w PSU.
Reserved for Q&A
1. Will there be upgrade parts for S1 and S2?
Yes, there will be. But we still need to solve some production/testing problem before we finalize the plan and public it.
S2 is 640pcs 55nm chips at 1000w
S2-->S4 could be upgradable with 90w blades of new chips. 9 chips per board 10w per chip and wut aroud 160Gh from each board and you get closer to 1,6TH miner with same thermaldensity and 1000w power consumption. Cooling and psu needs stay similar.
OR tuning up do the same with 8 chips per board.
Also design allows you to upgrade blade by blade. Manufacturing just the blade is supercheap when only real cost is the 9 chips. Rest of the blade is worth 12$ at mass production level. S1 and S2 blades are diffrent by design. Still both are very very simple and cheap to make.
1BTC S4 upgrade kit of 10 blades. haha I'm just tossing out some numbers here.
I could see myself paying 1BTC for upgrade..
Customer would get 60% increase in mining power with upgrade path. Upgrading blade by blade.
Long frogotten video how S1 blades are assembled.
http://m.youtube.com/watch?v=uxgdAT7B_DQ
ok thx! 
