Strap 1 on hynix should be the most stable, check your frequency on the memory setting. rather than using gpuz i run strap on 1 to find out the memory cause its faster not sure why you'd be having problems crashing unless you're pushing it too hard. If its the memory on the cards giving you an issue, remember Strap 4 is the higher intensity for Strap 1. It might? run better with that for some reason?
Make sure to watch your voltages. and DO NOT run Afterburner or wattman after setting the strap. Set the speed in the command line. Changing the speeds while Claymore is running you will enduce crashing as its not designed to work with on the fly like that. Its designed for you to change the straps and frequencies without rebooting, not without shuttind down the miner. I've seen many MANY people thinking on the fly means while the miner is running not within windows w/out rebooting.
Keep me posted. I am interested in your status on this.
I'm long time use my own straps. They work stable and fast for me. But we talking about Claymore miner straps.
I returned original vbios to check Claymore straps. And didn't used OC or UV, to check them. And my notices:
1. 1st strap is almost stable, but low speed.
2. 2nd less stable, speed is still low.
3. 3-4 straps are fast enough, but BSODs can happen in any time even after several seconds after launch.
Closing miner can hang sustem 50/50% even with strap 1. I think it's cause of miner returns old straps to card when closing.
I even tried to use my strap via string in command - all works fine, but closing miner can hang system too.
I repeat - all test maded with original cards bioses without any OC or voltage changing.
So I just flashed my straps and all goes normal.
It's all with hynix 8Gb MJR memory. It's very capricious.