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i5 750 locking up at stock clocks

post #1 of 6
Thread Starter 
recently put together a system with 750/GA-P55-UD3/4GB DDR3 Ram powered by a HX620 with a GTX470. I have windows 7 64bit on it and I tried some games and ran a few 3dmarks tests and the system seemed pretty smooth, however every 30min to 1h I get random system lock ups where the whole computer just freeze and I need to reboot. I'm plannig to OC so I bought a megahalem, temps are good at stock, low 30s idle and low 40s load, the system can do 1h of Linpack but I'm still getting random lockups very often and this is all at stock!

So I ran prime95 blend test to stress the ram, first run worker 4 died in about 5 seconds, second run the computer crashed in under a minute. Could it be the ram that may be faulty? or maybe the CPU or MB? I dont understand why I can play games and run 3dmarks ok but still get random lockups, and what puzzles me even more is how my computer failed prime95 blend test so quickly even at stock clocks.
Home Gaming PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 3.6Ghz at 1.425v Asus P5Q PRO XFX GTX285 2x2GB Corsair DDR2-800 
Hard DriveOptical DriveOSMonitor
1GB Spinpoint F3 DVD Writer Windows 7 Professional 64 Samsung 2494HS 
PowerCase
Corsair HX620 Antec P182 
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Home Gaming PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 3.6Ghz at 1.425v Asus P5Q PRO XFX GTX285 2x2GB Corsair DDR2-800 
Hard DriveOptical DriveOSMonitor
1GB Spinpoint F3 DVD Writer Windows 7 Professional 64 Samsung 2494HS 
PowerCase
Corsair HX620 Antec P182 
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post #2 of 6
Sounds like unstable RAM, is it configured according to manufacturers specs?
    
MotherboardGraphicsRAMRAM
TF8200 A2+ Radeon HD 5770 G. Skill G. Skill 
Hard DriveOptical DriveCoolingOS
ST3500418AS Samsung DVDRW Corsair H50 Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
S231HLbid @ 1080p Logitech G110 Antec NeoHE 500 XION Predator 
MouseAudio
Microsoft Intellimouse 3.0 ALC888 , Saitek GH 30 
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MotherboardGraphicsRAMRAM
TF8200 A2+ Radeon HD 5770 G. Skill G. Skill 
Hard DriveOptical DriveCoolingOS
ST3500418AS Samsung DVDRW Corsair H50 Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
S231HLbid @ 1080p Logitech G110 Antec NeoHE 500 XION Predator 
MouseAudio
Microsoft Intellimouse 3.0 ALC888 , Saitek GH 30 
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post #3 of 6
WEll i would use linx cpu stress test. And yes u could game for 2 hours and open the internet and crash = unstable. Make sure ram timeing are right and voltage. And mite want to look @ the uncore (2 times the ram speed) , also watch temps but a bump or 2 to cpu volts is best bet.
Dyslexia
(16 items)
 
  
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Dyslexia
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post #4 of 6
Thread Starter 
I'll check tomorrow but I really havnt touched any settings yet, the CPU/MB/Ram they are not new as I took it from another system but I built that one as well and I'm 100% sure I did not touch any settings in that one either.
Home Gaming PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 3.6Ghz at 1.425v Asus P5Q PRO XFX GTX285 2x2GB Corsair DDR2-800 
Hard DriveOptical DriveOSMonitor
1GB Spinpoint F3 DVD Writer Windows 7 Professional 64 Samsung 2494HS 
PowerCase
Corsair HX620 Antec P182 
  hide details  
Reply
Home Gaming PC
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 3.6Ghz at 1.425v Asus P5Q PRO XFX GTX285 2x2GB Corsair DDR2-800 
Hard DriveOptical DriveOSMonitor
1GB Spinpoint F3 DVD Writer Windows 7 Professional 64 Samsung 2494HS 
PowerCase
Corsair HX620 Antec P182 
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post #5 of 6
Definitely check your settings to make sure the ram is configured right, I've had rotten luck with boards actually running things at the right settings without me setting them up. That could easily cause the problems you're talking about.
Primary System
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte P55A-UD4P 2x EVGA GTX460 2x 4gb Corsair Vengeance 
Hard DriveCoolingCoolingCooling
Samsung F4 XSPC Rasa cpu block 2x XSPC Razor 460 Black Ice GTX 360 
CoolingOSMonitorKeyboard
MCP-350 Windows 7 64bit Samsung SyncMaster SA300 23" Filco Majestouch "Otaku" Tenkeyless 
PowerCaseMouseAudio
Corsair TX850W v1 NZXT Whisper Logitech Performance MX Altec Lansing ATP3 
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Primary System
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte P55A-UD4P 2x EVGA GTX460 2x 4gb Corsair Vengeance 
Hard DriveCoolingCoolingCooling
Samsung F4 XSPC Rasa cpu block 2x XSPC Razor 460 Black Ice GTX 360 
CoolingOSMonitorKeyboard
MCP-350 Windows 7 64bit Samsung SyncMaster SA300 23" Filco Majestouch "Otaku" Tenkeyless 
PowerCaseMouseAudio
Corsair TX850W v1 NZXT Whisper Logitech Performance MX Altec Lansing ATP3 
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post #6 of 6
Set bios to default settings > Check temps > RAM timing settings (Intel RAM profiling: off) > RAM voltages @ 1.5v and lower speed for stability testing.
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