Is the hash rate that the pool shows you inaccurate, because my hashrate is apparently at 82.9 GHash/s and I haven't overclocked:
{"hashrate1m": "82.9G"

Now 2 minutes later it has dropped to 53.1:
{"hashrate1m": "53.1G"

If the pool (CKPool) hashrate is accurate, clearly the U3 is very unstable.

I decided to start solo mining on an Antminer U3! I am using CKPool to do it and I'm using my Raspberry Pi as a controller. This is my stats so far:
{"hashrate1m": "67.3G", "hashrate5m": "63.7G", "hashrate1hr": "58.9G", "hashrate1d": "9.64G", "hashrate7d": "1.53G", "lastupdate": 1449912061, "workers": 1, "shares": 219756, "bestshare": 514557.60289778293, "bestever": 514557}
It has been running for 4 hours and cgminer says the difficulty is 50.

If you want to watch my stats: http://solo.ckpool.org/users/1MEWxQE7nyX5rTsnQxr9NmFdCVdMZQ5fkz
And I see what people mean when they say the U3 is unstable. The hash rate is varying between 50 and 68 Ghash/s (according to CKPool)

On the address the transactions of 25 BTC to it say 'Newly Generated Coins' which means they have been earned by mining.

Oh ok. Thanks for the reply anyway

I found an address that was solving blocks every 10 - 15 mins.
152f1muMCNa7goXYhYAQC61hxEgGacmncB
How do they do this? It doesn't look like a pool becuase they've generated a lot of coins but not sent out that many. so is it a farm or something like that?
If this is a farm, is that normal for a farm?