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Discussion Starter #1 (Edited)
Hi Guys,

New member here looking for some help to try and find out why my HTPC crashes on me sometimes. First off I have a the following.

ASUS P5E-VM HDMI MB
Crucial Ballistix 2gb Ram (2x 1GB) DDR2 PC6400 C4 800MHZ
Intel core duo E8500 LGA775 3.16GHZ CPU
OCZ Stealthxstream 500x silent ATX2 Power supply
zalman cnps8000 CPU Cooler.

When I first got the system it seemed ok after I updated the bios to 0604, but over time it will reboot say after a day or so being switched on, quite often with the message "overclocking failed press F1 to enter setup"

This leads me to think that the RAM may causing the problem, I have in the past tried memory testing program and what I found is that if I test right after a crash then I get errors, if I switch off for a while then test it performs great just even testing over night.

The system will then be fine until it crashes again a couple of days later, does anyone here think that the motherboard could also be suspect or the power supply?

Or any pointers as to how I can find the cause here?

Flopstien
 

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Discussion Starter #3
Hi Wrench,

Thanks for your reply. Although the system has not crashed yet I thought I would post up how things are running right now, so when it does crash I will know where to locate everything.

In the Bios page under hardware monitor I found the following

VCORE Voltage 1.200v
3.3V Voltage 3.246v
5v Voltage 5.040v
12v Voltage 12.264v
CPU temp 47C 166.5F
MB temp 40C 104 F

I will post up screen shots of the speedfan & core temp in the next post.

Flopstien
 

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Discussion Starter #6
I have downloaded everest, just trying to figure out where the voltages are displayed. Yes the board has intergrated graphics it's the intel G35 chipset and has an HDMI connection which is connected to my TV.

I do have a volt meter here that I can measure the 12v, do you know where it should be measured?

Flop
 

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Discussion Starter #7
Hi Wrench,

I couldn't find out where in Everest the voltages are displayed. If the voltage is to low would this point towards the PSU or the MB?

Flopstien
 

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Discussion Starter #9
Cheers Wrench, I installed sensor view and it reports the +12v as 11.60V so confirming your first point.

Do you think that the PSU is faulty or just not powerful enough for my system, being the 500w version? This system is only around 6 months old so components can be RMA'd if needed.

Flop
 

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Discussion Starter #13
I decided to get my volt meter out and test what voltage I had at the connector before I send it back, and found 12.40v, I then checked on the solder points underneath the main connector and again found 12.40v with the PC switched on.

Does this mean that the PSU is actually ok? or can I measure these voltages elsewhere on the MB for a more accurate reading?

Flop
 

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Discussion Starter #15
Ok, so I checked with windows running and it displayed 11.60v in sensor view, and 11.62v in speed fan.

I check the 4 pin CPU connector whilst it was connected, by probing the solderpoints on the underneath od the motherboard, right where the 4 pin connection is and got 12.40v, playing a game didn't make any difference.

Do you think the MB could be faulty instead?

Flop
 

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It could be but it seems more like a power issue to me, 11.6v is low and 12.4v is high while both are technically in spec the 11.6v is below the area we have seen problems with high power cards and 12.4v is higher then a quality supply should be putting out. So we're left with which reading is off either the volt meter is out of calibration or the sensors are off.
 

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Discussion Starter #18
Sorry for the delay in comming back, been a busy week at work then I got sick! so just got around to checking again today.

I measured with another volt meter and get much the same readings as my own, showing over 12v at the connectors. The machine has also been crashing today, I get a blue screen with some type of dump before it reboots.

After it rebooted I took a quick look at the stats and found the Vcore was dropping to 1.07v and the CPU temp was hitting 50c before dropping down to 46 again, not sure if this helps but thought I would mention it.

What do you reckon?

Flop
 

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Turn off auto reboot and get the error code off the blue screen.
Go to Start> Control Panel> Sysytem> Advanced> Startup and Recovery settings>
Then untick the Auto Reboot Box
After that any blue screen will stay on so you can copy and post the Complete error massage and full code.
 

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Discussion Starter #20
Thanks for that Wrench, I have changed that setting, but typically it hasn't crashed since. Interestingly I had around 3 reboots today and after the last one I switched the machine off at the switch on the back of the PSU, and left it for a while.

Now the system hasn't rebooted itself for a while, now I know this isn't conclusive but does point as you suggested to the PSU being bad, but I will post up the error meassage when it next dies.

Flop
 
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