Quote from: TheRider on November 28, 2016, 07:25:58 PM

Quote from: l30z1n on November 28, 2016, 07:16:11 PM

Guys, I need some help. I have a system with 5 GPUs, and I want to add one more (R9 390) to complete the 6 slots. My whole system is:

-ASROCK H81 PRO BTC
- Intel Celeron G1820
- 8GB RAM

GPUs:

- MSI R9 390 gaming 8G
- MSI R9 290x gaming 4G
- Gigabyte R9 290 reference
- Gigabyte RX 480 8GB refence
- XFX RX 480 8GB double dissipation with 8 pin

PSU:

- Cougar GX800 (holding motherboard and all rises + R9 390 and R9 290X)
- CX 750 (holding R9 290 and both RX 480)

The question is, do I need to upgrade the PSU or are these two already able to get the job done?

*If anyone has any tips on how to redistribute energy between the PSUs. Please, feel free to talk.

Are you already running it with 5 GPUs? Can you give more details regarding BIOS mods, voltage and clock mods? This will help give you more useful advice.

With that setup, I would be leaning toward adding the sixth card (390) under the CX 750 PSU.

Best thing you can do is measure power usage at the wall for each card individually, then do the math to figure out your best possible power distribution.

Yes, i'm already minning with 5 GPUs. I'm not using Bios mods, just a few overclock without volts increasing.

I do not remember very well, but once I got to measure with afterbuner and the resultators were like 100W each RX480 and 180W each other 3 GPUS.