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Why is my core speed changing?

post #1 of 7
Thread Starter 
Not sure if this should go in the mobo or cpu section...

I've got an i7-2600k with an Asus P8P67 Deluxe. As a first pass, I let the Asus Auto Tuning run through its tests to see what I'd get. It bumped to over 5Ghz before becoming unstable, but is telling me it's now running stable at 103x49 (5048ish). However, as I watch the CPU Frequency in the AI Suite tools (and core speed in CPU-Z), it's alternating between 1648 and 5048.

I'm a bit confused by this - shouldn't it be holding solid at whatever OC values it found stable? Or should I not even use the Auto Tuning and OC through the BIOS instead?

Core voltage is fluctuating between the 1.2s up to 1.4v.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600K [4.8x100 @1.395v] Asus P8P67 Deluxe 2xMSI NGTX560 Ti Twin Frozr OC G. Skill Ripjaw X Series 1600 8GB 
Hard DriveOptical DriveOSMonitor
OCZ Vtx 3 MIOPS, 2xWD Cav Blk 2TB Samsung SH-S223 Win7 Ultimate Dell U2410, Dell 2407WFP 
KeyboardPowerCaseMouse
MS Natural 4000 Seasonic X850 Corsair 600TM Cyborg RAT 7, Logitech G500 
Mouse Pad
Mionix Propus 380 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600K [4.8x100 @1.395v] Asus P8P67 Deluxe 2xMSI NGTX560 Ti Twin Frozr OC G. Skill Ripjaw X Series 1600 8GB 
Hard DriveOptical DriveOSMonitor
OCZ Vtx 3 MIOPS, 2xWD Cav Blk 2TB Samsung SH-S223 Win7 Ultimate Dell U2410, Dell 2407WFP 
KeyboardPowerCaseMouse
MS Natural 4000 Seasonic X850 Corsair 600TM Cyborg RAT 7, Logitech G500 
Mouse Pad
Mionix Propus 380 
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post #2 of 7
Speedstep/C1E

Power saving features that lower your CPU clock and V-core to save power and produce less heat..
 
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CPUGraphicsRAMHard Drive
Athlon 64 3500+ 2.2Ghz 9800GX2 (wet) 1998Mhz Shader 4.5GB mixed WD Caviar black 20GB 'SS' 
Optical DriveCoolingOSMonitor
Cheap beige DVD ROM Koolance full copper GX2 block Vista 32bit LG W2486L 
PowerCase
Antec EA650 Antec 900 
CPUMotherboardGraphicsRAM
I7 920 D0 P6X58D-6 [Full mosfet/Northbridge blocks) GTX480 3x 2GB Dominator 1600Mhz 8-8-8-24 
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M4 64GB WD Green 1.5TB 2x WD CB 640GB Lite-on 22x dual layer, ASUS Blu-ray 
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Custom loop Windows 7 64 bit LG W2486L Microsoft (cheapest they had) 
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Corsair TX950 Lancool PC-K62 Microsoft X5 Akira theme 
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Logitec 5.1 
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Fun inside...
(17 items)
 
 
CPUGraphicsRAMHard Drive
Athlon 64 3500+ 2.2Ghz 9800GX2 (wet) 1998Mhz Shader 4.5GB mixed WD Caviar black 20GB 'SS' 
Optical DriveCoolingOSMonitor
Cheap beige DVD ROM Koolance full copper GX2 block Vista 32bit LG W2486L 
PowerCase
Antec EA650 Antec 900 
CPUMotherboardGraphicsRAM
I7 920 D0 P6X58D-6 [Full mosfet/Northbridge blocks) GTX480 3x 2GB Dominator 1600Mhz 8-8-8-24 
Hard DriveHard DriveHard DriveOptical Drive
M4 64GB WD Green 1.5TB 2x WD CB 640GB Lite-on 22x dual layer, ASUS Blu-ray 
CoolingOSMonitorKeyboard
Custom loop Windows 7 64 bit LG W2486L Microsoft (cheapest they had) 
PowerCaseMouseMouse Pad
Corsair TX950 Lancool PC-K62 Microsoft X5 Akira theme 
Audio
Logitec 5.1 
MotherboardRAMHard DriveOptical Drive
EVGA P55 2x 2GB Corsa 2133MHz 250GB DVD-RW 
CoolingOSMonitor
Air Vista Business 32bit 17" 
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post #3 of 7
turn off intel speedstep technology in bios=problem solved
lotdash0t's PC
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i5 4670k 4.5 GHz @ 1.385V Gigabyte G1 Sniper Z87 XFX 6950 unlocked 920/1400 8GB Vengeance Pro 2400Mhz  
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Samsung 840 evo 120GB + Crucial M4 60GB 2TB Samsung Spinpoint F3 Noctua NH-D14 Windows 7 Professional x64 
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ASUS 23" 1080p + ViewSonic 23" 1080p BlackWidow Ultimate 2013 Thermaltake Toughpower XT 775w Zalman Z11+ 
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lotdash0t's PC
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i5 4670k 4.5 GHz @ 1.385V Gigabyte G1 Sniper Z87 XFX 6950 unlocked 920/1400 8GB Vengeance Pro 2400Mhz  
Hard DriveHard DriveCoolingOS
Samsung 840 evo 120GB + Crucial M4 60GB 2TB Samsung Spinpoint F3 Noctua NH-D14 Windows 7 Professional x64 
MonitorKeyboardPowerCase
ASUS 23" 1080p + ViewSonic 23" 1080p BlackWidow Ultimate 2013 Thermaltake Toughpower XT 775w Zalman Z11+ 
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Razer DeathAdder 2013 Razer Goliathus Beyerdynamic DT770 Pro + Samson SR 850 + Xonar ... 
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post #4 of 7
my advice leave it on, it doesn't seem to effect the overclock and it helps overall temps.
it looks alive
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Sandy Transformed
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i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
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LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
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it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
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LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
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post #5 of 7
Thread Starter 
Ah I didn't even think to check there. Still getting used to this new EFI. I've always had that disabled in the past, but as long as it kicks into high gear as needed w/o any issues I guess I don't mind too much. It will bump instantly as needed, right?

Also, is the Auto Tuning feature pretty reliable? Or would I be better of setting everything myself? I've run Prime95 for a short test (maybe 45mins) and a few games for several hours w/o any problems and with temps never passing 65C on the auto settings. Idle hangs around mid 30s.
Edited by Dalz - 6/8/11 at 6:18pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600K [4.8x100 @1.395v] Asus P8P67 Deluxe 2xMSI NGTX560 Ti Twin Frozr OC G. Skill Ripjaw X Series 1600 8GB 
Hard DriveOptical DriveOSMonitor
OCZ Vtx 3 MIOPS, 2xWD Cav Blk 2TB Samsung SH-S223 Win7 Ultimate Dell U2410, Dell 2407WFP 
KeyboardPowerCaseMouse
MS Natural 4000 Seasonic X850 Corsair 600TM Cyborg RAT 7, Logitech G500 
Mouse Pad
Mionix Propus 380 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600K [4.8x100 @1.395v] Asus P8P67 Deluxe 2xMSI NGTX560 Ti Twin Frozr OC G. Skill Ripjaw X Series 1600 8GB 
Hard DriveOptical DriveOSMonitor
OCZ Vtx 3 MIOPS, 2xWD Cav Blk 2TB Samsung SH-S223 Win7 Ultimate Dell U2410, Dell 2407WFP 
KeyboardPowerCaseMouse
MS Natural 4000 Seasonic X850 Corsair 600TM Cyborg RAT 7, Logitech G500 
Mouse Pad
Mionix Propus 380 
  hide details  
Reply
post #6 of 7
yes its ok to leave them on, but i woudln't use the auto tune utility, and i also wouldn't increase the blck, take it back to 100 and set 50x mutliplier.
X99 Main Rig
(10 items)
 
  
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Intel 5960X Extreme Edition @ 4.5GHz Always Changing VisonTek R9 290 G.Skill Ripjaws 4 16GB (4x4GB) DDR4 @ 3200MHz 
Hard DriveHard DriveHard DriveCooling
Samsung 128GB M.2 PCI-E 4x SSD Apotop 256GB SSD 1.82TB NAS Noctua NH-D15 with both fans 
OSPower
Win7 Pro Enermax 1000W 
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X99 Main Rig
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel 5960X Extreme Edition @ 4.5GHz Always Changing VisonTek R9 290 G.Skill Ripjaws 4 16GB (4x4GB) DDR4 @ 3200MHz 
Hard DriveHard DriveHard DriveCooling
Samsung 128GB M.2 PCI-E 4x SSD Apotop 256GB SSD 1.82TB NAS Noctua NH-D15 with both fans 
OSPower
Win7 Pro Enermax 1000W 
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post #7 of 7
Speedstep / Turboboost technology, just leave it on its fine, but if u really dont like it, just go into the BIOS and disable it. What it does is, if your processor is idle, it will drop your clock speeds to save energy and reduce heat, if your CPU is under a full quad core hogging load, it will bump it up to the specified frequencies, if its under a 3 core load, i believe it goes up 1 speed bin, if its under a load that only uses 2 cores it goes up 2 speed bins, and so forth. for example, an intel core i7 860 runs at 2.8GHz. it is running an application that only uses 1 core. it will drop the clock speeds of the other cores, and boots the core that is being used to 3.4GHz, maintaining power efficiency, and temperatures at a nice level.
    
CPUMotherboardGraphicsRAM
Intel Core i7 3960X Extreme Edition Gigabyte GA-X79-UD3 MSI GTX 980 Gaming 4G HyperX Fury Red - 16GB DDR3 1866MHz 
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AMD Performance OEM - 16GB DDR3 1866MHz Sandisk Ultra II 500GB SSD Samsung 830 128GB SSD WD Caviar Black 500GB 
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WD Caviar Green 1TB MSI DVD Burner Corsair H100i Windows 10 Education 64Bit 
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Asus VE247H AZIO MGK L80 Mechanical Keyboard Corsair HX1050 NZXT Phantom 210 
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CPUMotherboardGraphicsRAM
Intel Core i7 3960X Extreme Edition Gigabyte GA-X79-UD3 MSI GTX 980 Gaming 4G HyperX Fury Red - 16GB DDR3 1866MHz 
RAMHard DriveHard DriveHard Drive
AMD Performance OEM - 16GB DDR3 1866MHz Sandisk Ultra II 500GB SSD Samsung 830 128GB SSD WD Caviar Black 500GB 
Hard DriveOptical DriveCoolingOS
WD Caviar Green 1TB MSI DVD Burner Corsair H100i Windows 10 Education 64Bit 
MonitorKeyboardPowerCase
Asus VE247H AZIO MGK L80 Mechanical Keyboard Corsair HX1050 NZXT Phantom 210 
MouseMouse PadAudioAudio
CM Sentinel Advance DXRacer Zero Series - White Shark Creative Sound Blaster Z Sennheiser HD 598Cs 
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