Hi everybody,
I need some guidance/advice. I got
- MoBo Asrock H110 Pro BTC+
- 8 GB Ram
- 128 GB SSD
- 6 x Sapphire RX580 8GB Nitro+ Special ed.
- 4 x MSI RX580 8GB Gaming OC
- 2 x 1200W PSU Corsair HX1200 (Platinum)
- 1 x 750W PSU Chieftec (Gold)
- Win10 64 up to date (latest version), no antivirus
- ATI drivers 17.11.4 (setting "compute" on all cards (all cards properly recognized)
main 1200W PSU powers motherboard, CPU, PCI slots, SSD, all 10 risers
secondary 1200W PSU powers 6 GPUS
third 750W PSU powers 4 GPUs
The BIOS of all GPUs is modified and the settings in Afterburner (or in my case TRIXX) are 1150 core, 2150 mem, - 132 core voltage.
Running cryptonight algorythm the hashrate per card is approx 710 h/s and total power consumption on full load from the wall is around 1230 Watt (monitor excluded) . System running very stable.
However when I fire up Claymore with Ethash algo hashrate per card is approx 32 and full load on the wall jumps up to approx 1450 watt and system shuts down with a clack and reboots....
I have tried connecting the GPUs to different PSUs but no change. Cryptonite always stable and no matter what configuration Claymore shuts down my system as soon as full load is reached.
I can't be a question of lack of power because my PSUs provide more than enough juice for the whole system. Any ideas or hints would be greatly appreciated.
The clack is when a PSU port line OCP is overloaded and shuts down to protect the circuitry. With the balanced wiring you should be able to run you rig with two PSUs only. How are your risers connected to the PSU? Hint: Connect the risers to the 8-pin ports (as many as you can). For the rest - when you run out of 8 port cables-empty ports on PSU) - connect to the 6-pin ports. Only connect max 2 risers per sata/molex cable.
Identify (User Manual) what are the individual ports max amperage values and make sure you are not chaining too much to the same port or port group.
Background: On my PSU (Corsair AX1500i) there are ten (10) 8-pin port connectors each protected by 40 A OCP and six 6-pin for SATA/peripheral protected all together by 40A OCP. So all 6 ports (6-pin) combined can only sustain at max level 40 A. This can sustain up to 6 risers. Connecting 7th riser on this same set makes in my case exactly your behavior, which in my case happens in 10 minutes of running the miner, consistently.
When you connect your GPU to the risers and an 8 port power it will draw up to 75 W (about 5-6A). Connecting 10 risers, all to SATA ports would yield 60 A, combined.
In your case I guess you are combining 10 risers to the 6-pin PSU ports via SATA-molex cables and so pulling too much power and the PSU is clacking it self down. This only happens at maximum load when you start mining at highest rate.
The occurrence of power shutdown when an PSU OCP is exceeded is harmful and can burn your components.
If you need more help PM me.
If this solved your problem send your gratitude to ETH: 0x4d45B1B0467e3D02e686936DBE0659e74Bb2Cf52