And here they are:



My DOA/Reject rate instantly climbed from less than 2% to over 18% with the addition of your S4 before you switched it off prematurely 

It would have been a more accurate test of your S4 with p2pool if you had kept it running for the full 10 minutes - but as we can clearly see by the graph, the S4 does not work efficiently with p2pool, as you wrongly stated earlier with your 1 minute screen. It also didn't get anywhere near 2Th.

I was under the impression that Bitmain was doing some major development with their hardware & it's problem with p2pool - but this miner seems to be a bigger version of the poorly performing S2 with p2pool I'm afraid.

Can you tell me what settings you were using in cgminer?

IYF.

Replied questions:

1. S4 is compatible with p2pool?
Yes

2. When do we release the latest firmware?
Engineers have released one version of firmware merged cgminer 4.6.1 today, which is now being tested. And we will upload it to bitmaintech.com when it is tested running stably.
Please PM us if you have any request about current verson firmware.

3. how to upgrade latest firmware  to S2?
 Now the latest firmware for S3 and S4 is ready to be released soon, that one for S2 is being developed. Stay tuned here.