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Strange Auto Vcore detection and OCing results, E4400 @ 3~3.3ghz plz help

post #1 of 3
Thread Starter 
Hi, i'm running a E4400 on a XFX 650i (latest BIOS), stock cooler.

At a CPU FSB of:
1213 my CPU auto detect voltage shows up in the bios as 1.28V (10x multi = 3033mhz) (this is what i've been running on unlinked for a week) max load = 45C idle at 24C
1333 my CPU auto detect voltage shows up in the bios as 1.40V (9x multi = 2997mhz) (linked or unlinked)

I booted up at 1334 CPU FSB (for fun) with a 10x multi (3335mhz) linked & synced, runs stable etc. CPUID shows CPU voltage at 1.4V. NVmonitor shows CPU core at 1.45V load temp went up to 37C idle 64C max load.

The box my CPU came in said Max Voltage 1.35V hehe. somehow i dont really trust what my mobo reads for Vcore.... because

I tried setting my CPU FSB to 1334 and then setting the voltage lower than 1.4V manually. i set it to 1.35V. rebooted, and the bios measures a Vcore of 1.31V. with a 9x multi linked or unlinked, i couldnt boot into windows.

Weird how you dont get the Vcore you set, and weird how the auto Vcore detected depends on what FSB you're running. Its a nice mobo besides that and the ****ty Ntune software.

I've also got a phantom Speedstep problem. Even with speed step and thermal throttling disabled and windows power options set to "Always On" the multiplier still goes down to 6x when there is no load. By the way, all the voltage readings i've taken are either in the BIOS or in windows at full load and full speed/multiplier setting (9 or 10) (i watch it in CPU-Z)

so there are 2 main issues
1. Vcore is auto detected differently depending on CPU FSB (1.4V or 64C possibly too high for this chip?)
2. CPU runs at 3033mhz with 1.28v (1213 CPU FSB and 10x multi) but cant run at 2997mhz at 1.31v (1334 CPU FSB and 9x multi)

The most important things i'd like to know is safe Vcore for this chip and safe max load temp. I know these C2Ds usually run cool. but does that mean its bad for them to run a bit warmer? Lots of CPUs run at almost 70C for a long time.
post #2 of 3
umm speed step and something else needs to be disabled in bios
Coeus
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AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
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Coeus
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CPUMotherboardGraphicsRAM
AMD 940 Msi 970a-g46 2x xfx 7970 G Skill NQ PC1333 4x2 
Hard DriveOptical DriveOSMonitor
Seagate 7200.9 160gb need Windows 10 64bit Sharp 32inch 
Power
Thermaltake 1350 
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post #3 of 3
I would say 65C max but some will say 60C.

I wouldn't go above 1.45v on air personally.

70C+ should be left for the quads.

As for you OCing issues it doesnt make sense to me that 3033mhz would be stable at 1.28v and 2997mhz isn't stable at 1.31v. The only thing I can think of is that your are considering reaching the desktop as stable.

My guess is that both of those are not stable, and you have a chance to get to the desktop, and it failed one time but didn't the other.

Running a stress testing program with small FFT for 3+ hours is the oly way to prove stability. Some will say even longer.
The Leviathan
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The Leviathan
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Intel i7 6700k @ 4.7GHz MSI Z170A Gaming M7 12GB NVIDIA Titan X (Pascal) 32GB G.Skill Ripjaws V (DDR4 3200) 
Hard DriveHard DriveCoolingCooling
2x 1TB Samsung 960 PRO 193TB unRAID Server 3x 140mm Noctua NF-A14 Noctua NH-D15 
OSMonitorKeyboardPower
Windows 10 Pro x64 65" LG 65E6P (4K OLED) Ducky DK9008 Shine 3  Corsair AX860 
CaseMouseAudioAudio
Corsair Obsidian 750D Logitech G502 Proteus Sprectrum Denon X7200WA (Receiver) 2x Klipsch RF-7 (Front Speakers) 
AudioAudioAudioAudio
4x Klipsch RS-62 (Surround Speakers) Klipsch RC-64 (Center Speaker) 4x Klipsch CDT-5800-C II (Atmos Speakers) 2x SVS PB16-Ultra (Subwoofers) 
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