Bad news... I popped it 
I had it working with a 20 mhz crystal for 5 minutes still was testing the hash rate... then it stopped responding. Now cgminer cant identify it, even with the stock resistors and crystal in place
I felt so bad, why I didn't post anything in a while.
On another note I figured out my clock gen circuit was putting out 5v not the 3.3 it should have been. Chances are this is what killed the chip not the speed.
still though I popped it
Got 3 more coming in the mail soon
I wonder if I could get a replacement chip cheep?
I had it working with a 20 mhz crystal for 5 minutes still was testing the hash rate... then it stopped responding. Now cgminer cant identify it, even with the stock resistors and crystal in place
I felt so bad, why I didn't post anything in a while.
On another note I figured out my clock gen circuit was putting out 5v not the 3.3 it should have been. Chances are this is what killed the chip not the speed.
still though I popped it
Got 3 more coming in the mail soon
I wonder if I could get a replacement chip cheep?
What core voltage were you running it at? Ya I'd say the 5v clock signal probably done it in. I'm sure these will run stable at 20Mhz the only issue will be cooling. Do you have any estimates on temps or power consumption? Really sucks it cooked but thats just the price we pay sometimes.
Keep us updated!