My rig is frying my motherboards

[Phalnax]

Hi.

I have just built a mining rig frame. Picture here

http://sv.tinypic.com/r/2a0kcoy/8

At first I used a asrock motherboard and it was going just fine for about 2 days with 3 280x cards. But then it just stoped responding. All fans was going and so but the rig was just not accesable.

Then I bought a ASUS M5A99FX PRO R2.0.

I started with 2 x280 cards with 16x - 16x risers. Was working just fine.
Then I added another x280 on a 1x - 16x powerd riser without the power inserted in the riser.
The the rig would just not boot anymore.
Tried another PSU. Just nothing.

Removed the 8 pin psu connector from motherboard, then all fans started and so on. Connected the 8 pin again. Everything dead.

Would be greatful if anyone hade any Idees. Is the rig frame wrong, am I connecting things wrong, is my psu bad, anything.

[apsvinet]

Have you considered getting an external fan?

[ajaxmoor]

Better get a cooler system it worth it .

[Phalnax]

hi, I have cooling system, forgot to tell you that.
The rig just died on boot after I installed the third card. So no cooling problem. the two cards was running on about 75 C (167 degres farenheit I think).

[Duane Vick]

You should use powered risers and plug them in.

[vm1990]

Could be a few problems I'm going to guess at the motherboards cant handle the extra voltage being forced back down the pcie channel from the extra powers risers. Dose it work if you go back to 2 cards with no risers?

If it doesn't boot anymore the reseat both the CPU and the ram keep to 2 cards and it may boot back to life

[hulk]

Hi.

I have just built a mining rig frame. Picture here

http://sv.tinypic.com/r/2a0kcoy/8

At first I used a asrock motherboard and it was going just fine for about 2 days with 3 280x cards. But then it just stoped responding. All fans was going and so but the rig was just not accesable.

Then I bought a ASUS M5A99FX PRO R2.0.

I started with 2 x280 cards with 16x - 16x risers. Was working just fine.
Then I added another x280 on a 1x - 16x powerd riser without the power inserted in the riser.
The the rig would just not boot anymore.
Tried another PSU. Just nothing.

Removed the 8 pin psu connector from motherboard, then all fans started and so on. Connected the 8 pin again. Everything dead.

Would be greatful if anyone hade any Idees. Is the rig frame wrong, am I connecting things wrong, is my psu bad, anything.

The rig you show seems good, its even better then my rig actually. I think its more of a software problem (ie. window) then hardware problem. Otherwise buy a external fan would help..