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H81 BTC Pro with 6 290x -- Powered risers or regular risers

post #1 of 6
Thread Starter 

Mobo: H81 BTC Pro

GPU: 6 290x

PSU: 2 1200W

 

  1. Should I purchase powered risers or just regular risers 
  2. Should I use the motherboard's additional 4-pin power connectors (depending on your riser recommendation)
  3. Which power supply should the molex adapters use?

 

 

I've seen LOTS of posts that contradict each other. Was wondering if there was anyone out there with an answer or experience.

post #2 of 6
I got some powered USB 3.0 risers. All four that I bought worked perfectly right away, which I was pleasantly surprised about. They came with SATA power connections, so I hooked them up directly to the PSU, half on one PSU and half on another to split the load evenly.

I have 5 290x with 2 1000 w PSU's, so I split it up to be 3 and 2, with the CPU and motherboard on the PSU with 2 GPU's, obviously. With your setup, I suppose you'll just have to load one more slightly more heavily than the other. You should be fine, since they're 1200 W.

Hope this was helpful. These are the risers I bought, if you're interested. What are you planning on mining?
post #3 of 6
say not to ribbon cable risers, specially the powered ones with the flimsy soldered molex

you want USB powered risers, this is the best price i've seen http://www.ebay.com/itm/PCI-E-Powered-Riser-Card-60cm-24-USB-3-0-Cable-6-pack-/171259847074

no need to power the mobo molex using when powered risers


my guess is that people are frying things as a combination of crappy overloaded PSUs, defective risers with uneven loads/grounds
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post #4 of 6
Use one or the other. Just not both.
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post #5 of 6
Thread Starter 

Both posts seem like some sage advice. Essentially what I was thinking. I'd love to save some money and use non-powered risers.

 

I'd just use the 4 pin power connectors on the mobo. I have 2 1200W PSU so I *should* be fine on power.

 

Now I just wonder what PSU I should hook the 4 pin power connector up to. I've read a couple of places that said it can cause issues plugging them into the "wrong" power supply.

 

 

Thoughts??

post #6 of 6
Do not run that much power through the mobo. I mod my cables, It's easy. google it. And separate the 12v from the mobo side and go straight to the card.
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