As far as i can see now, this embedded image is really stable.

Works slightly under the hashrate of 8.7 promised. Average is 8.5-8.6 . Frequency is 600Mhz.

I think, the image which I bought the R4 with was clocked at 725, but not sure.

What I can say is, that quantity of Hw errors is down by far! was x thousand, now just a few.

What images are others using at which frequency ?