20 mins so far and i'm not getting more the 210
Take it down to 212 and see if that helps.
my two are at 212.5 and getting very good numbers at my friends office. I actually think something is wrong but in my favor>
Note to btcguild could you be over reporting s-3 hashes?
I am getting 450 each right now at 212.5 clocks! I will watch this like a hawk as I should be doing 430 not 450.
+1 ...
I am getting HIGHER hashrate at BTCGuild as well...

S3 #1 ...Slightly OC - 225MHz...local @ 450GH ...pool @ 480GH...
S3 #2 ...Stock, no OC - 218.25MHz...local @ 442GH ...pool @ 452GH...
Go figure ...

But I should not complain about that...
ZiG
(edit:2%) fee, which is 9GH equivalent. So, what's the advantage?