x99 ud4 - sli with ATX4P no boot, without boots fine

[crookeddeebz]

Hello, Just got a 2nd gpu for sli. Rig was flying with a single gpu.

My motherboard wont boot when I have the ATX4P installed for PCIE extra power (as per manual, says with 2+ gpu plug this in)

First, this is silly as an x99 gen should even have molex. But luckily my evga g2 came with 1 molex style connector.

Boots fine, havent done any testing or bench without the ATX4P. Either 1 card or two cards of course.

Any suggestions?

thank you


spec:
x99 ud4
5820k @4.3
4x4gb ddr4
zotac 980 amp omega
asus strix 980
evga 750w g2 (gold)

Things ive tried:
- diff PSU slot
- diff molex on the chain
- 1 card, 2 card same issue
- sli bridge, no sli bridge

[Vinster]

Re: x99 ud4 - sli with ATX4P no boot, without boots fine

your power supply isn't big enough...

go though this power supply calculator and it'll tell you how big you need.

MSI Canada

Vin

[crookeddeebz]

Re: x99 ud4 - sli with ATX4P no boot, without boots fine

doubtful, all calcs come to 650-700watt for my rig. im on a 750 gold. sli works with out the atx4p, but not with.

however i did figure it out.

Gigabyte actually made the molex slot so you can plug in either direction! im surprised i didnt bin the board

a molex should only fit one way...however not in the x99-ud4 lol.

checked the keying, and turned it around. Was problematic before as the h440 doesnt allow much viewage on bottom facing mobo bits.

please close.