Looks like there is a fan power hub over rear fans (should have the rear and probably top fans (small 3 or 4 pin flat connector plugged into it. Look for a Molex connector inside the case near rear fans that will connect ro Molex from PS. Check section 2.3 (Kuhler liquid cooling) for better...
Exactly like this except mine does not have the window side panel. (Solid panel with 82 or 90MM TT stock fan).
Huge heavy almost indestructable case.
New NZXT coming this week.
Is PCI E enabled in boards BIOS? Latest Bios edition for the motherboard?
Is monitor display port plugged into 1st video card or are you still using MB connection?
Another nod for 750Ti.
Another consideration is your actual house wiring. Is your house/apt/room current modern construction or is it 20/30 years old or older? Could make a difference in what is available at the wall and quality of that power as well. Also how much draw is being used on the...
My original build had 1 4GB Adata 1600 to hold me until my Crucial 4x4 arrived. On initial build selected XMP profile in UEFI bios.
When my Crucial arrived reset UEFI bios to default and shutdown. Inserted one stick Crucial into slot A2 and booted back into UEFI/Advanced mode and selected XMP...
XMP enabled, memory remapping enabled?
Looks like timings are close but one kit is 667/other kit is 800. You will probably have to run them at 667 and then work them up until you can find a happy spot.
Actually with XMP looks like they all should run 800.