x99 sabertooth build with weird O/C fail and no boot

Chris_413

Prominent
Mar 21, 2017
2
0
510
Hi all,

I have a strange issue with my X99 build. I run a mild overclock of 4ghz, bump the CPU voltage upto 1.25v and use the XMP profile for my memory. 99% of the time it runs fine and would run all day every day if i let it.

On occasion I get a overclock failed on boot....but only if I have a long day out and the PC has been off a long time. So I go into BIOS and reload the current O/C profile and reboot again, same msg again. If I load defaults and boot I get further sometimes but sometimes I get no display after the windows load icon and generally just issues trying to POST/boot. I end up taking the case off and playing around removing DIMM modules / swapping gfx etc and suddenly one time it just works again.

The kit I bought is pretty decent and its only done it 2-3 times in a years time but I'm wondering if it's a capacitor issue on the PSU/board. I think the sabertooths are tested quite thoroughly so I'm more thinking PSU?

Asus TUF X99 Sabertooth Intel X99 (Socket 2011) DDR4 ATX Motherboard
Corsair Vengeance 16GB (4x4GB) DDR4 PC4-19200C14 2400MHz Quad Channel Kit - Black (CMK16GX4M4A2400C1
Intel i7-5820K 3.30GHz (Haswell-E) Socket LGA2011-V3 Processor - Retail (BX80648I75820K)
Fractal Design Define S Midi Tower Case - Black Window
Noctua NH-D15S Dual Radiator Quiet CPU Cooler
Super Flower Leadex Platinum 750W Fully Modular "80 Plus Platinum" Power Supply - Black
Noctua NF-A14 PWM Fan - 140mm
MSI GTX970
120gb / 500gb Samsung Evo SSD's

Not really sure where to put this one but thx in advance

Cheers
 
Solution
Sounds like something may not be quite stable.

At 4ghz, the 5820K don't need 1.25v but around 1.15v or even stock voltage, though 1.25v is not going to hurt it if temps are good. Mine hits 4.5ghz at just 1.27v.

I would start by upping the RAM voltage some, Try 1.3v and see if that sorts your problems out, I for some reason needed 1.36v on mine to get 4 sticks to read all the time. Some Asus thing, big forum about their boards with RAM voltage with boot issues like you mentioned.

If that don't work, lower the voltage of the RAM back to where it was at, Auto, no need to have a high voltage than whats needed.

You can also try raising the Input voltage to 1.95v and give it a try, if you still have the same issues, again set it back to...
Sounds like something may not be quite stable.

At 4ghz, the 5820K don't need 1.25v but around 1.15v or even stock voltage, though 1.25v is not going to hurt it if temps are good. Mine hits 4.5ghz at just 1.27v.

I would start by upping the RAM voltage some, Try 1.3v and see if that sorts your problems out, I for some reason needed 1.36v on mine to get 4 sticks to read all the time. Some Asus thing, big forum about their boards with RAM voltage with boot issues like you mentioned.

If that don't work, lower the voltage of the RAM back to where it was at, Auto, no need to have a high voltage than whats needed.

You can also try raising the Input voltage to 1.95v and give it a try, if you still have the same issues, again set it back to default or wherever you set it.

You can also try System Agent voltage, try 1.0v, still not working? Try 1.1v, if it still don't seem to solve anything, set back to where it was, and get back with us, and we can see what we can suggest from there.

Good Luck!
 
Solution