5930k overclock unstable after adding second graphics card

[toran0x]

Hey guys. I've had (what seemed to be) a pretty stable overclock going.

125x base clock @ 4.37, 1.18 voltage, .15 SA voltage, XMP Profile for 3000mhz memory, 4ghz uncore/cache. Now that I added another card, things have been freezing and booting doesn't always work (tells me to set bios to optimal defaults bc of a boot failure).

SO, I'm wondering where to look first. I assume a bump in CPU voltage would be good and a small bump in SA voltage. Wondering if I need to bump RING voltage or VRIN also? Both are set to auto right now. I also have the option of adjusting the VL1-VL6 voltages.

Thoughts?

 

[toran0x]

Any ideas? I dropped to 4.25, 1.2 vcore, .35 SA, and 1.15 RING now. Issue always seems to be boot. Haven't had a crash in Windows yet or while gaming.

Here's my current hwmonitor with these settings. View attachment HWMonitor.txt

 

[Witchdoctor]

A second card should not be a factor in the CPU overclock

take it back out and confirm it is not a quncidance

if it all checks out your power supply may be not functioning properly as it has plenty of Amps

 

[toran0x]

A second card should not be a factor in the CPU overclock

take it back out and confirm it is not a quncidance

if it all checks out your power supply may be not functioning properly as it has plenty of Amps

Hmm. I've read in a bunch of places that adding another card can destabilize OCs. I should also clarify that the settings in my previous post are new - will see how they fare.

How do I test if my power supply is not functioning correctly?

 

[Witchdoctor]

Never has for me personally, but that is not to say it couldn't be a factor ?

Does the the board have a molex or 6 pin for additional power for multi card set up ? , if so worth a try

The easiest way to test a power solution is to try another one that is know to operate properly

 

[toran0x]

I think first I'm going to reset my CMOS and start the OC from scratch.

 

[toran0x]

EDIT: The numbers below are all wrong. BIOS confirmed all voltages are fine and stable. So, seems to be no issues there.
---

Also, I was looking at the HWmonitor I posted - my 12v is at 4.22 volts, which seems really low. I don't see how these numbers can be remotely accurate.

Hardware monitor ITE IT8620
Voltage 0 1.20 Volts [0x64] (CPU VCORE)
Voltage 1 2.48 Volts [0xCF] (VIN1)
Voltage 2 1.99 Volts [0xA6] (+3.3V)
Voltage 3 3.37 Volts [0xA7] (+5V)
Voltage 4 4.22 Volts [0x58] (+12V)
Voltage 5 -4.22 Volts [0x58] (-12V)
Voltage 6 -9.94 Volts [0xCF] (-5V)
Voltage 7 2.86 Volts [0x8E] (+5V VCCH)
Voltage 8 1.52 Volts [0x7F] (VBAT)

A few things could be going on here:
- The new GPU could be defective - pulling too much power
- The PSU could be defective
- HWMonitor could be reading the voltages wrong

Looks like I have some testing to do.

 

[toran0x]

There's a recommendation in this thread (granted slightly dated), to bump IOH/NB, vcore, and vcc a bit. Will try that too.

http://www.overclock.net/t/1494197/cpu-overclock-unstable-after-adding-second-gpu-for-sli

 

[magellan]

Hey guys. I've had (what seemed to be) a pretty stable overclock going.

125x base clock @ 4.37, 1.18 voltage, .15 SA voltage, XMP Profile for 3000mhz memory, 4ghz uncore/cache. Now that I added another card, things have been freezing and booting doesn't always work (tells me to set bios to optimal defaults bc of a boot failure).

SO, I'm wondering where to look first. I assume a bump in CPU voltage would be good and a small bump in SA voltage. Wondering if I need to bump RING voltage or VRIN also? Both are set to auto right now. I also have the option of adjusting the VL1-VL6 voltages.

Thoughts?

4 GHz cache/uncore clock speed could be it. The best I could ever get was around 3.7 GHz and that wasn't stable.

Does your motherboard have the x99 overclocking socket?

 

[toran0x]

4 GHz cache/uncore clock speed could be it. The best I could ever get was around 3.7 GHz and that wasn't stable.

Does your motherboard have the x99 overclocking socket?

Hey Magellan - thanks for the reply. Yes my mobo has it and enables the VL1-VL6 voltages if that's what you mean. It also has the extra CPU pins available (I think that's what you meant actually). I will check the uncore and bring that down to earth a little.

UPDATE: Currently at 4.25 / 125 base clock / 1.21v / .25 SA / 1.10 RING -- when I dropped RING to auto, I had boot issues - bringing to 1.10 remedies that. Gonna try this during some gaming sessions to see how it fares and also through some cold boots. Ultimately I want to bring down voltages as low as possible as this will be my 24/7 overclock.