Issues when powering on pc

[longy35]

Define R5 
Cooler Master v1000W / Antec earthwatts 750W 
i7 5930K + Corsair GTX H100i cooler
ASrock X99 extreme6/3.1
Geforce GTX 570
Samsung 950 Pro M.2 512gb
Corsair Vengence LPX  8gb
3x 120case fans
Windows 10 x64 ver.1607

So first time putting together my own PC. 
Worked great for about 6-8 weeks, then started not powering up at all, no fans, no light nothing. Come back many hours later and it would be on.
Started trouble shooting, eventually worked out that unpluggging PSU then plugging back in would get it going. Changed to old Antec 750W PSU, pc powers on with this PSU for 1 second, then powers off for 3, then turn on and is fine.
Looking over case for totally unrelated reason, found that rear i/o panel tab was sticking into my usb type c female plug, i assume shorting it out. Fixed this, Cooler Master PSU still does not power on at all when asked, Antec still powers on/off/o.
Powered both PSU on with paper clip and both come on fine. When Cooler Master PSU installed, green wire has correct 5V, then drops to .7-.9V and does not power on, although does seem to make a very slight wine from PSU. Checked same thing with Antec PSU and it has the same 5v, then drops to .8, then gets 5V again, then looses it again, I assume Antec PSU is fine.
SO.....
Why would motherboard be telling Antec PSU to turn on, then off, then on again? Would the short in usb type C socket fry CPU?
I have tried reseating GPU, CPU and RAM to no avail.
Have run bench on CPU-Z to test CPU scores 1661 single thread and 10359 multi-thread which seems passable from what i can gather. Can CPU score well, work well and still be damaged?
Thanks in advance
 

CPU Name

Intel® Core™ i7-5930K CPU @ 3.50GHz

Threading

1 CPU - 6 Core - 12 Threads

Frequency

3597.87 MHz (36 * 99.94 MHz) - Uncore: 2998.2 MHz

Multiplier

Current: 36 / Min: 12 / Max: 37

Architecture

Haswell-E/EP / R2-Step (22 nm)

Cpuid / Ext.

6.F.2 / 6.3F

IA Extensions

MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, VT-x, AES, AVX, AVX2, FMA3

Caches

L1D : 32 KB / L2 : 256 KB / L3 : 15360 KB

Caches Assoc.

L1D : 8-way / L2 : 8-way / L3 : 20-way

Microcode

Rev. 0x0000036

TDP / Vcore

140 Watts / 1.037 Volts

Temperature

34 °C / 93 °F

Type

Retail (Stock Frequency : 3500 MHz)

Motherboard

Model

ASRock X99 Extreme6/3.1

Socket

Socket 2011 LGA

North Bridge

Intel Haswell-E rev 02

South Bridge

Intel X99 rev 05

BIOS

American Megatrends Inc. P3.00 (03/24/2016)

Memory (RAM)

Total Size

8192 MB

Type

Single Channel (64 bit) DDR4-SDRAM

Frequency

1066.1 MHz - Ratio 1:16

Timings

15-15-15-36-2 (tCAS-tRC-tRP-tRAS-tCR)

Slot #1 Module

Corsair 8192 MB (DDR4-2137) - XMP 2.0 - P/N: CMK32GX4M4B3333C16

Graphic Card (GPU)

GPU Type

NVIDIA GeForce GTX 570 (GF110) @ 780 MHz

GPU Brand

GIGABYTE Technology

GPU VRAM

1280 MB @ 1900 MHz

Storage (HDD/SSD)

Model #1

Seagate ST3320620AS

Capacity #1

320 GB

Model #2

Samsung SSD 950 PRO 512GB

Capacity #2

512 GB

Display

Screen #1

FP222W (BNQ76F1)

Screen #1 Spec

22 inches (55.9 cm) / 1680 x 1050 pixels @ 56-76 Hz

Miscellaneous

Windows Version

Microsoft Windows 10 (10.0) Home 64-bit

Windows Subver.

Build 14393

CPU-Z Version

1.78.1 (64 bit)