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[SOLVED] i7 2600k at 1600MHz under load

post #1 of 18
Thread Starter 
P8P67 PRO mobo with i7 2600k on Windows 7 Premium 64bit.
I've tried enabling/disabling SpeedStep and Turbo Mode - CPU-Z and ASUS Suite always reports CPU with x16 multiplier while Prime95 is running.

Now the very first Prime95 run with TM on made it run very hot (85C) so I disabled Turbo Mode while stock heatsink is on just in case.

No real O.C. right now, pretty much everything is Default/Auto except memory XMP profile.

Going insane here. At boot CPU speed reported as 3425MHz, Intel Processor Diagnostic Tool reads 3.398GHz... Yet everything else is showing 1600 (x16 multiplier). I'm gonna try to set it to a specific multiplier later tonight and see if it works.

Any other ideas?
Edited by trialex - 4/15/11 at 6:10pm
post #2 of 18
bump
Tardis
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Tardis
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post #3 of 18
Sounds like its running too hot.
post #4 of 18
Thread Starter 
Now it's 36C idle <50C under Prime 95 but it won't go over 1600MHz
post #5 of 18
Could it be that your BCLK is set wrong? Have you flashed the BIOS as well just to take care of any microcode issues?

I would try the following, in any case --

1. Reset all CPU-related stuff to "Auto" to let the BIOS pick up CPU speeds etc.
2. See how it behaves in Windows - check CPU-Z realtime readouts, etc.
3. Try a milder load on the CPU - say, ripping a DVD or doing a math-intensive calculation. See what load temps are and what the speed changes to.

Let's go from there, I guess.
Edited by Quantum Reality - 4/15/11 at 2:33pm
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post #6 of 18
Thread Starter 
BCLK is 100, MoBo came with latest 1502 BIOS so I didn't touch it yet. I am pretty sure I saw numbers above 1600Mhz when I was installing Windows couple days back.

Unfortunately I can't back trace to the moment where it went all wrong.
post #7 of 18
Ok, according to Intel, your CPU should run at 3.4 GHz normally. The default BCLK of your CPU is 100 MHz so yeah, you should be seeing a 34x multiplier. Huh.
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Samsung 850 EVO SSD Samsung DVD/CD-writer Corsair Hydro H60 Windows 7 
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4690K System
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HTPC
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HP dv6 laptop
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CPUMotherboardGraphicsRAM
Core i5 4690K ASRock Z97 Extreme4 XFX Radeon 7950 32 GB DDR3-2133 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO SSD Samsung DVD/CD-writer Corsair Hydro H60 Windows 7 
MonitorMonitorPowerCase
ASUS PA248Q Dell U2412M XFX 850W Black Edition XXX Fractal Design Arc Midi 2 
CPUMotherboardGraphicsRAM
Pentium Dual Core E6700 MSI G41M-P33 Combo ATI HD4350 Kingston ValueRAM DDR3-1333 
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Case
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post #8 of 18
Try clearing the CMOS by removing the battery for at least 5 minutes and start over again. Sometimes just using the jumper pins to clear the CMOS doesn't clear everything. You'll have to reset the time and date before you start. Make sure you set EPU to disable before you change any other settings.
    
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post #9 of 18
If you disabled turbo more OR speedstep, it should run at 34x100 all the time, regardless of what it's doing. With them on, it should idle at 16x100 and turbo up to whatever your multi is at load.

What program are you using to monitor multiplier in windows?
post #10 of 18
cpu is getting too hot my 920 does the same thing at 105C
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