Here's another rig I have running Cryptonight-Heavy with GGS 1.3.7 alpha. This rig has 10x RX 570 8GB Nitro+ but somehow Windows 10 detects them as RX 580 after upgrading to Adrenaline 18.4.1

and my GGS settings:

Those churning ~820 h/s are Samsung DDRs and the rest at ~750 h/s are Hynix
I haven't toyed with the Memory Timings, kind of scared to fuck up my cards.
Anyone can help me improve my hashrate please?

Will be happy to give a tip (0.005 BTC) if someone can help me get them to ~900-1000+ with stability.
So let's help and get these cards over 1000h/s on CN-Heavy :
Depending on the driver you use:
18.3.4
2-124-8 and 1200-900-2150-900 Hynix (Voltages can be tweaked when max hash is found)
2-124-8 and 1200-900-2050-900 Samsung (Voltages can be tweaked when max hash is found)
18.4.1
2-118-8 and 1200-900-2150-900 Hynix (Voltages can be tweaked when max hash is found)
2-118-8 and 1200-900-2050-900 Samsung (Voltages can be tweaked when max hash is found)
Start with Intensity around 110 and raise it step by step (best is only a single card to get the idea what they like). I let each card run 5min as a test - that sould give you an idea how the card likes the settings - as not all cards are eqaul. On 18.3.4 most cards top around 124, 18.4.1 differs a bit - there it is around 118+-. With 1225 on the cores you should reach/top 1100 on Samsung and get close to 1100 on Hynix. I know it's a bit tweaking needed - but the results pay back easy

Check the straps you use on both of them, normaly everyone useds on Samsung the "1Click" one ->
1750 and up -> 777000000000000022CC1C00AD615C41C0590E152ECC8608006007000B031420FA8900A00300000
010122F3FBA354019
Hynix 1750 and up -> 999000000000000022339D00CEDD6B4470551414B80D960B0040C400750314204A8900A00200000
018123745B92B3A16
There is still some room for tweaks, as the rams probably can do more then what i wrote - but needs testing ... Hope i could help and you get these GPUs over 1000h/s soon

18.3.4 ->
https://imgur.com/a/aKu7ZRjCheers
Wow thanks Pete_X really appreciate this. I got my Samsungs up around 1015 h/s at 110 intensity with your settings. Still working on the Hynix but I'm hopeful I can get them there too now. Please DM me your BTC address!