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Boots to BIOS only when H-100 molex is NOT connected

post #1 of 4
Thread Starter 
Right guys, I couldn't figure out what was going amiss.

Now it turns out that my sig rig will only boot to bios when the molex pin for my H-100 water supply is not connected (found out by accident when i forgot to attach it, realised when the bios said, "CPU over temperature")

I can boot to bios, then connect the molex pin and it will still post. Only trouble is i'm not convinced that the H-100 is actually doing anything. Initial temps are at 70c and decided to turn it off when that hit 79c frown.gif

Any idea why this is happening? Is this a mobo issue or a water cooling issue? I'm thinking the latter especially considering the temps i'm getting... but it does seem very odd that this one molex pin seems to prevent me posting.
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 3930K @4GHz/1.25V ASUS P9X79 Deluxe EVGA GTX 680 32GB G.Skill Ripjaws 2133MHZ  
Hard DriveHard DriveCoolingOS
Intel SSD X-25M G2 160GB WD Black 1TB, WD Green 2TB Corsair H-100 Win7 x64 
MonitorPowerCase
23" Samsung PX2370 LED (1920x1080) + 22" iiyama Corsair HX 750W Corsair 650D 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 3930K @4GHz/1.25V ASUS P9X79 Deluxe EVGA GTX 680 32GB G.Skill Ripjaws 2133MHZ  
Hard DriveHard DriveCoolingOS
Intel SSD X-25M G2 160GB WD Black 1TB, WD Green 2TB Corsair H-100 Win7 x64 
MonitorPowerCase
23" Samsung PX2370 LED (1920x1080) + 22" iiyama Corsair HX 750W Corsair 650D 
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post #2 of 4
Might not be core temp that's causing the overtemp shutdown, what are the mobo/chassis/cpu heat spreader temps?
post #3 of 4
Thread Starter 
mobo is at 30C abients are about 21C. i don't know if it is that the pump isn't working and that is what is preventing it from posting can it do that? So maybe a faulty H-100?
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 3930K @4GHz/1.25V ASUS P9X79 Deluxe EVGA GTX 680 32GB G.Skill Ripjaws 2133MHZ  
Hard DriveHard DriveCoolingOS
Intel SSD X-25M G2 160GB WD Black 1TB, WD Green 2TB Corsair H-100 Win7 x64 
MonitorPowerCase
23" Samsung PX2370 LED (1920x1080) + 22" iiyama Corsair HX 750W Corsair 650D 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 3930K @4GHz/1.25V ASUS P9X79 Deluxe EVGA GTX 680 32GB G.Skill Ripjaws 2133MHZ  
Hard DriveHard DriveCoolingOS
Intel SSD X-25M G2 160GB WD Black 1TB, WD Green 2TB Corsair H-100 Win7 x64 
MonitorPowerCase
23" Samsung PX2370 LED (1920x1080) + 22" iiyama Corsair HX 750W Corsair 650D 
  hide details  
Reply
post #4 of 4
Possibly, does/did it make any noise while running? Is it softly vibrating? Humming at all? If You can't get any life out of it, might have to try and RMA it frown.gif

EDIT: yeah if the pump's not working, you get a cell of water stuck in the block, unable to dump it's heat into the radiator. This will cause the CPU to quickly reach it's max temperature and shut itself down to prevent damage to itself smile.gif

Not sure how quickly this happens, but it's likely that it'll happen during post, at the very latest as windows boots...

Another thought, if the pump has an electrical fault, it may well be tripping a protection circuit in the PSU, another reason the pc won't POST properly.
Edited by Goof245 - 12/8/11 at 7:23am
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