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I've tested a GTX970 on a thin mITX board and that worked out completely fine, it seems like that just drew most of its power through the PEG connectors.For safety reasons, I would either cut all 12V power connections from the PCIe slot to not overload the Mainboards VRMs, or use a powered riser, like QinX did. The one you link seems absolutely fine, too, though you might get EMI problems with it.
I've tested a GTX970 on a thin mITX board and that worked out completely fine, it seems like that just drew most of its power through the PEG connectors.
For safety reasons, I would either cut all 12V power connections from the PCIe slot to not overload the Mainboards VRMs, or use a powered riser, like QinX did. The one you link seems absolutely fine, too, though you might get EMI problems with it.
