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5 Ghz Overclock Black Screen After Sleep

post #1 of 9
Thread Starter 
To start, my build is a 3960x on a Rampage IV Extreme. I've had it overclocked to around 4.4-4.5 Ghz for the past few months.

I've just installed an open loop water cooler, which opened up a lot of thermal headroom for me to overclock. My chip overclocks pretty well I can hit 4.5 Ghz at 1.3v, but with my new cooler and overclocking insurance that just seems a bit too conservative.

At 5 Ghz I can boot into windows and run prime stably for several minutes at least at 1.43-1.44v with high LLC (CPUz voltage of 1.43-1.44 during prime), but if I let my computer sleep it won't return from sleep. The fans and pump will turn on and the keyboard and mouse will light up, but the monitors won't turn on. The only thing I can do to bring it back is hold down the power until it shuts down and boot back into the bios.

I've tried pumping the voltage up as far as 1.49v and the same thing happens no matter what. I've also tried raising the PLL voltage to 1.9v and setting a manual boot up voltage. I'd prefer to keep my voltage below 1.5 no matter what as there's really no point trying it higher than that as I won't be leaving it there 24/7 even using voltage offset.

I'm wondering if anyone has any advice on settings that I may have missed. I haven't been able to find anything online about why this would be happening so any help would be appreciated.

Thanks in advance.
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post #2 of 9
I think its probably just some of the CPU states (C1, C3 etc) or other power management settings that are interfering with it. We've bought several scan.co.uk overclocked bundles at work and they state you can't let windows go into standby (which win 7 does by default after 30 mins) or the exact same thing happens.

What happens if you put the BCLK and multiplier back to 4.5ghz (or stock) settings in your bios, does it still fail to resume from standby? My guess would be yes as I suspect you've disabled some hardware power management feature.
 
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post #3 of 9
Thread Starter 
All c states are enabled as are power management options in the bios. It will resume from sleep at any frequency up to 4.8 GHz (I haven't tried 4.9). I only have problems resuming with 5 GHz.

When I clock to 5 the only thing I change is the vcore. All other setting are the same.
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post #4 of 9
Do you have the 'internal PLL over voltage' set to anything but auto? Came across this thread elsewhere suggesting that stops the sleep/wake cycle due to violations of intel spec.

(http://forums.overclockers.co.uk/showthread.php?t=18269571)

To quote the relevant parts

"From the Asus bios thread at hardforum:

"- Improved BCLK and DRAM OC capabilities when enabling the “Internal PLL Overvoltage” option in BIOS. Note - Sleep/Hibernate will not operate properly due to Intel Specs."

So yes, this setting improves OC ability but prevents sleep hibernate from working.

http://hardforum.com/showthread.php?t=1578865 "

I appreciate its not the same processor but the internals are pretty much all the same
 
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post #5 of 9
Thread Starter 
I do set the PLL manually, but I leave it at 1.8 which I believe is the normal voltage. It is the voltage that the auto option in the bios sets, but I set PLL, VTTD, and System Agent voltages manually as the bios sometimes raises them more than I'd like automatically.

I will try with the higher voltages for Vcore and "auto" for PLL, VTTD, and System Agent and see if it makes any difference when I get home as I haven't tried that yet.
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post #6 of 9
Hello, what pharcycle means is this.

You have two settings in bios:

PLL Voltage: here you can set a voltage to your liking, like 1.6v or leave it on Auto.

Internal PLL Over Voltage: This setting only has 3 options, "On", "Off" and "Auto".
(And stands seperate of the PLL Voltage you entered above, its for the other parts the pll voltage is used for)

He means if you have Internal PLL Over Voltage on Auto i think
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post #7 of 9
Thread Starter 
I see. I'll look for that in the bios options, but I've never changed it or noticed it before.

Any reason why any of these options would only impact 5 Ghz+? Even if Internal PLL Over Voltage can impact my Sleep/Hibernate I don't understand why it would only happen at 5 Ghz and not 4.4-4.8.
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post #8 of 9
Quote:
Originally Posted by prescotter View Post

Hello, what pharcycle means is this.

You have two settings in bios:

PLL Voltage: here you can set a voltage to your liking, like 1.6v or leave it on Auto.

Internal PLL Over Voltage: This setting only has 3 options, "On", "Off" and "Auto".
(And stands seperate of the PLL Voltage you entered above, its for the other parts the pll voltage is used for)

He means if you have Internal PLL Over Voltage on Auto i think

pretty much, I've never really exhaustively tested it or researched it much, it was sufficient for me to not use standby but I'm aware that there are various settings that conflict with the Intel spec and for whatever reason causes standby to fail to resume. I don't use standby as its more often a hindrance than anything else - the system can standby when downloading a file for example causing you to have to start it again, various hardware are often reported not to work after a resume and if I want remote access to my PC it needs to be on. When I'm done I turn it off, which of course you can do remotely.

Your overclock settings shouldn't affect hibernate though and I'd recommend it over standby as its much safer and almost as fast - it writes the contents of the RAM out to your hard drive and then turns off the computer. When you turn it back on, your system goes through its usual POST before reloading the data so your CPU should come up as usual. Its an all software solution and doesn't rely on processor state or power management to do it and you don't risk losing anything if you forget its in standby and decide you need to move your computer or otherwise unplug it as your system is off anyway. But that's just me.
 
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post #9 of 9
Thread Starter 
Quote:
Originally Posted by pharcycle View Post

pretty much, I've never really exhaustively tested it or researched it much, it was sufficient for me to not use standby but I'm aware that there are various settings that conflict with the Intel spec and for whatever reason causes standby to fail to resume. I don't use standby as its more often a hindrance than anything else - the system can standby when downloading a file for example causing you to have to start it again, various hardware are often reported not to work after a resume and if I want remote access to my PC it needs to be on. When I'm done I turn it off, which of course you can do remotely.

Your overclock settings shouldn't affect hibernate though and I'd recommend it over standby as its much safer and almost as fast - it writes the contents of the RAM out to your hard drive and then turns off the computer. When you turn it back on, your system goes through its usual POST before reloading the data so your CPU should come up as usual. Its an all software solution and doesn't rely on processor state or power management to do it and you don't risk losing anything if you forget its in standby and decide you need to move your computer or otherwise unplug it as your system is off anyway. But that's just me.

The Rampage 4 Extreme bios doesn't have an option for "PLL overvoltage" it just allows me to set the PLL voltage manually if I want.

Good advice on the hibernate option I might try that if I decide to try 5 Ghz 24/7. I know my vcore isn't holding me back as I tested at 1.53 volts last night and had the exact same result. I wanted to rule that out.

I've got it at 4.8Ghz using offset voltage and it's 100% prime 95 stable right now which is fine for me.

I'd just like to figure out what could be causing this strange behavior at 5 Ghz.

Thanks for the responses!
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Windows 8.1 Pro 64 Bit Dell U2711 NEC 1080P 27" Logitech G710+ 
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Corsair HX1050 Corsair Carbide Air 540 Logitech G500 Astro A40 
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F 3.0
(16 items)
 
  
CPUMotherboardGraphicsRAM
I7 5820K Asus X99 Deluxe Gigabyte GTX 970 G1 Gaming Crucial Ballistix Sport 
Hard DriveHard DriveOptical DriveCooling
Samsung 840 EVO 500GB Seagate 600 480GB WD Green 3TB Custom Water 360MM 
OSMonitorMonitorKeyboard
Windows 8.1 Pro 64 Bit Dell U2711 NEC 1080P 27" Logitech G710+ 
PowerCaseMouseAudio
Corsair HX1050 Corsair Carbide Air 540 Logitech G500 Astro A40 
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