Well you've done all the calculations below for the new run,
So I'll just add in the pool numbers to compare

Run R606-d0s5r004*: Approaching 960GH/s
UI Run Average : 904.4GH/s - (diff x 2^32 per nonce)
Pool Accepted : 904.9GH/s (client side)
A = 18228076 / 86899 * 2 ^ 32 = 900.9; 900.9/904.4 = 99.6%.
A + R = 18309284 / 86899 * 2 ^ 32 = 904.9; 904.9/904.4 = 100%.
*Adjusted to only count hashrate on successful submit_nonce (test_nonce)
http://23.108.83.14/images/R606-d0s5r004-00.JPGR606-d0s5r004 : Summary of stats:
[2019-04-24 07:00:13.630] Started at [2019-04-23 06:50:51.565]
[2019-04-24 07:00:13.630] Runtime: 24 hrs : 9 mins : 22 secs
[2019-04-24 07:00:13.630] Average hashrate: 904048.5 Mhash/s
[2019-04-24 07:00:13.630] Accepted shares: 32627
[2019-04-24 07:00:13.631] Accepted difficulty shares: 18228076
There were a number of (short) reconnects during this run, so that also may have lowered the hash rate a tiny bit (but not much)
The first connect was: [2019-04-23 11:50:50.483+00] Authorised client ... worker ... R606-d0s5r004 ...
The last share was: [2019-04-24 12:00:09+10]
Thus elapsed is: 24hrs 9mins 19sec = 86959sec
Shares accepted: 32677
Difficulty accepted: 18267544.0
There's 50 extra shares at the pool, but anyway the results are:
Diff * 2^32 / Time = 18267544.0 * 2^32 / 86959 = 902.2 GH/s
The
MinersSupply GekkoScience R606 Terminus has been going strong on power level 7 for nearly 24 hours now, using the following settings:
cgminer.exe -o stratum+tcp://nya.kano.is:3333 -u xXxXx.R606 -p x --gekko-newpac-freq 775
Here is the cgminer screenshot from that run:
https://i.postimg.cc/HkMfGpDx/R606-CGMINER-NEW-2.jpgGoing with the last run/start to stop:
[2019-04-24 21:31:50+00] Authorised client ... worker ... R606 ...
Last share: [2019-04-25 19:06:27+00]
Thus elapsed is: 21hrs 34min 37sec = 77677sec
Shares accepted: 3841
Difficulty accepted: 15740418.0 (all 4098 Diff)
Diff * 2^32 / Time = 15740418.0 * 2^32 / 77677 = 870 GH/s