New build turns itself on and off repeatedly

Well it has confused the hell out of me mate.

I have you tried to do what it says in post 6 mate on the link you gave.
 
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Yep, tried flashing with/without the CPU and one stick of RAM installed and every combination. Doesn't do anything. Tried with two different USB sticks as well. The BIOS light flashes when I turn the PSU on but it does that every time, USB stick or not.
 
I had a look at the link. The difference is that the Tom's Hardware thread is about the X99-UD4. That board features Q-Flash Plus which allows the BIOS to be recovered from a memory stick if both the primary and secondary BIOS are corrupted.

The X99-SLI only has the standard Q-Flash option - you still need to be able to get into the BIOS or get to the splash screen to run it.

Might be worth trying another brand. If you still get the same, it has to be the CPU.
 
So annoying considering OcUK sell them as a bundle. Bought a MSI X99A SLI Krait Edition Intel X99 so hopefully will have more look and then I'll have to get RMAing...
 
I see you are in Bristol.

I've got a known working old i5-2400 with stock cpu cooler you could borrow if you wanted ?

and some spare memory.

Would help diagnose and/or allow you to flash the mobo.
 
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It's doing the same thing with the new MSI motherboard. What the actual ****. I'm completely lost, other than it being a X99 / Haswell-E compatibility issue. Is it known to be a massive issue?
 
Is this with the first CPU or the second one? There should be no compatibility issues with a 5820K on X99. I can't believe you keep getting sent dead motherboards, something else isn't right.

What RAM is it? I know some boards can be funny with RAM that isn't on the QVL.
 
So the original order was:

Gigabyte X99-SLI
Intel Core i7 5820K
XFX XTR Series 750W 80 Plus Gold Fully Modular Power Supply
Team Group Dark Pro 16GB (2x8GB) DDR4 PC4-25600C16 3200MHz Dual Channel Kit

I then bought another X99-SLI, no result. Then another i7 5820k, no result. Then an MSI X99A SLI Krait. No result.

However with the MSI X99A, 5820K and XFX PSU plugged in and nothing else, it boot loops. If I stick one DIMM in it stays on (I think - mobo lights are permanent anyway). But that's as far as I can get. Adding the GPU (KFA2 GeForce GTX 960 Reference 4096MB GDDR5) and I still get no signal out or beeps etc.

In the meatime I've tried every combination of CPU and motherboard (first order, second order, MSI etc) as well as different kettle leads, different plug sockets and different PSUs, all built out of the case. Realised another station I built in 2014 has the same i7 5820K and the now discontinued MSI X99S and that's fine so what the ****!
 
I had a very similar issue with a friend's PC. Random restarts after booted, sometimes not even getting to BIOS splash and other times running for weeks with no issue.

Tried replacing PSU at first as was most logical step, this was an older modular variety and one of the connectors looked a bit poor. Issue remained. Next I did memtest on memory which showed up no issues but still tried taking out all modules, bar one and trying in different slots. Next I tried replacing GFX card and still threw up same issue. Next HDD including all SATA cables, CPU cooler, you name it, running with no hard drives or DVD drive connected, fans (apart from CPU fan) disconnected, any molex/SATA splitters that could be removed taken out. The only thing I was left with from the original build was the case, everything was either new or tested with my own working gear.

I even unplugged all the case cables on mobo and used an old IDE hard drive jumper instead of a switch to start the PC, just to prove whether there was a faulty switch (even though I'd used reset switch as power).

Eventually the issue turned out to be the case cables had been taped down and for tidiness by the builder (not me or OCUK) had been run underneath the motherboard and were shorting underneath the memory slots.

Pulled cables out after unscrewing the motherboard from the risers that were in the way and it has been fine ever since.

Well worth checking that out as this PC had been solid as a rock for 6+ years and just started randomly developing this fault. I reckon it took me 20 hours or more to figure this out and £400 of new kit (he was going to upgrade anyway) and honestly thought I was going crazy a few times.
 
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