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My CPU acts strangely

post #1 of 4
Thread Starter 
So I was testing the cpu overclock with Prime95 try to find the sweet spot and I noticed that during the test one core would only run half of the test than the other cores do.
I'm not sure why and what is causing this to happen. Also recently when I play game (BF3 aftermath dlc) the CPU would runs at 100% while the GPU usage shows only about 50%. I have updated the GPU driver to 310.70.

Any help will be appreciated.

Here is the screenshot during the stress test.
My System
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 3570k ASUS P8Z77-V PRO MSI HD 7950 2 x 4GB G-SKILL RIPJAWS X 1600mhz 
Hard DriveHard DriveHard DriveCooling
OCZ Vertex 4 256GB Crucial C300 64Gb WD Black 750GB CoolerMaster Hyper 212+ 
OSPowerCaseAudio
Win 7 Ultimate 64bit Corsair AX 750W Phanteks Enthoo Pro ASUS Xonar DG 
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My System
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 3570k ASUS P8Z77-V PRO MSI HD 7950 2 x 4GB G-SKILL RIPJAWS X 1600mhz 
Hard DriveHard DriveHard DriveCooling
OCZ Vertex 4 256GB Crucial C300 64Gb WD Black 750GB CoolerMaster Hyper 212+ 
OSPowerCaseAudio
Win 7 Ultimate 64bit Corsair AX 750W Phanteks Enthoo Pro ASUS Xonar DG 
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post #2 of 4
The core that works slower is also loaded with the OS's CPU usage.
My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
OSMonitorKeyboardPower
Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
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My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
OSMonitorKeyboardPower
Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
  hide details  
Reply
post #3 of 4
Thread Starter 
But i never have this happened to me before.
When I first build the system I also test the overclock with Prime95 but the 4th core would run as many test as the other cores would run.
My System
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 3570k ASUS P8Z77-V PRO MSI HD 7950 2 x 4GB G-SKILL RIPJAWS X 1600mhz 
Hard DriveHard DriveHard DriveCooling
OCZ Vertex 4 256GB Crucial C300 64Gb WD Black 750GB CoolerMaster Hyper 212+ 
OSPowerCaseAudio
Win 7 Ultimate 64bit Corsair AX 750W Phanteks Enthoo Pro ASUS Xonar DG 
  hide details  
Reply
My System
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 3570k ASUS P8Z77-V PRO MSI HD 7950 2 x 4GB G-SKILL RIPJAWS X 1600mhz 
Hard DriveHard DriveHard DriveCooling
OCZ Vertex 4 256GB Crucial C300 64Gb WD Black 750GB CoolerMaster Hyper 212+ 
OSPowerCaseAudio
Win 7 Ultimate 64bit Corsair AX 750W Phanteks Enthoo Pro ASUS Xonar DG 
  hide details  
Reply
post #4 of 4
Hmm. I suppose you checked your task manager for interfering apps?
My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
OSMonitorKeyboardPower
Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
  hide details  
Reply
My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
OSMonitorKeyboardPower
Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
CaseMouse
DeLUX Logitech 
  hide details  
Reply
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