Question MSI ProSeries intel coffee lake won't run

[Astro_Blu_Jax]

MSI ProSeries Intel Coffee Lake H310 LGA 1151 won't power up when I connect PCI-E 6 pin. I'm kinda new to all this so if anyone wants to help me try to power this up that would be great.

 

[rgd1101]

full system spec? include make and model of the psu

 

[Astro_Blu_Jax]

Also, the power supply is
Apevia ATX-PR800W Prestige 800W 80+ Gold Certified, RoHS Compliance, Active PFC ATX Gaming Power Supply

 

[rgd1101]

still need full system spec

 

[Astro_Blu_Jax]

Power Supply:

• Apevia ATX-PR800W Prestige 800W 80 Plus Gold Certified & RoHS Compliance, Active PFC ATX Gaming Power Supply. Comes with 3-year warranty.
• Supports Dual/Quad/multi-core CPUs. Supports single 12V output for higher power usage
• Dc to DC converter design, provides superior dynamic response, greater system stability and maximizes the 12V DC rail output
• Multi-gpu technologies supported; 6 pin and 8 pin PCI-E connectors support all GPU platforms. Built in 1 x auto-thermally controlled black 135mm fan
• Connectors: 1 x 20/24pin main power, 1 x 4/8pin 12V, 2 x PCI 6+2pin, 7 x SATA, 4 x peripheral. All protections

MotherBoard:

• Supports 9th/ 8th Gen Intel Core/ Pentium gold/ Celeron Processors for LGA 1151 socket
• Supports DDR4 Memory up to 2666MHz
• Audio Boost reward your ears with studio grade sound quality
• Ez Debug LED easiest way to troubleshoot
• X-boost software that auto-detects and allows you to boost the performance of any storage or USB device

(I don't know if this should affect anything but just in case it does)
Case:

• Larger area of air-intake mesh at front panel
• Tempered glass side-panel
• Bottom loaded PSU
• 15mm clearance for cable management
• 1 x USB 3. 0 +1 x USB 2. 0 Ports