Last August, I built a video editing workstation with the following components:
Gigabyte GA-P35-DQ6
XFX PVT80GTHF9 GeForce 8800GTS 640MB
Intel Core 2 Quad Q6600
Mushkin Hp2-6400 Ddr2 4gb Kit
Western Digital Caviar HD 500G|WD 7K 16M SATA2 WD5000AAKS
SILVERSTONE TEMJIN SST-TJ06S-W Silver Aluminum
Seasonic S12 Energy Plus SS- 650HT Power Supply
Turtle Beach Montego DDL 7.1 Dolby Digital
Pioneer DVR-112D
ZALMAN 9700 LED 110mm 2 Ball CPU Cooler
For the past ten months, the system has been clocked with a 400MHz FSB and CPU multiplier of 9X. These numbers were reached through exhaustive torture testing to assure that CPU core temps are well below 70ºC under maximum load under four instances of Prime95, and that memory produced no errors on MEMTEST86.
For ten months the system worked flawlessly.
However, lately, I've been noticing difficulty playing back HD video in Premiere. It stutters and CPU utilization was hitting 90% instead of the usual 37%.
Last night, to save energy, I shut the system off for the first time since last summer. When I powered it on today, I noticed that the BIOS reported the CPU clock at 2.4GHz instead of the usual 3.6. So I went to the BIOS MB Intelligent Tweaker to check what had caused the reversion to stock speeds. I noticed that CPU Host Control was DISABLED. So I enabled it again. F10 and save. System powered DOWN! A short time later, the system powered back up and the the clock control was again disabled.
Thinking that maybe it's slightly warmer in here than before (but wondering how a cold system that's been powered off all night could be overheated), I tried walking the clock speed down in 5MHz increments. 395, 390, 385... still shuts off the power... I got it down to 300 and still no startup and then I REALLY got concerned.
So then finally I decided to try the absurd.. I set the clock to 266. The system then booted. Okay, so we know we're good at 266FSB. Let's try 267. Nope! System powers down! So I then try 265, just to see if it's something that is preventing anything but exact stock speeds. It powered down again--at 265MHz FSB!
Obviously, something is seriously wrong with that system now.
BTW, the RAM tests good in MEMTEST86.
The problem is that, as of this morning, the system will not allow the FSB to be adjusted AT ALL. It MUST be exactly 266MHz in order to boot now. That is very strange!
If there are any other Gigabyte GA-P35-DQ6 motherboard owners here, have you experienced this type of failure and if so, what was the cause?
Gigabyte GA-P35-DQ6
XFX PVT80GTHF9 GeForce 8800GTS 640MB
Intel Core 2 Quad Q6600
Mushkin Hp2-6400 Ddr2 4gb Kit
Western Digital Caviar HD 500G|WD 7K 16M SATA2 WD5000AAKS
SILVERSTONE TEMJIN SST-TJ06S-W Silver Aluminum
Seasonic S12 Energy Plus SS- 650HT Power Supply
Turtle Beach Montego DDL 7.1 Dolby Digital
Pioneer DVR-112D
ZALMAN 9700 LED 110mm 2 Ball CPU Cooler
For the past ten months, the system has been clocked with a 400MHz FSB and CPU multiplier of 9X. These numbers were reached through exhaustive torture testing to assure that CPU core temps are well below 70ºC under maximum load under four instances of Prime95, and that memory produced no errors on MEMTEST86.
For ten months the system worked flawlessly.
However, lately, I've been noticing difficulty playing back HD video in Premiere. It stutters and CPU utilization was hitting 90% instead of the usual 37%.
Last night, to save energy, I shut the system off for the first time since last summer. When I powered it on today, I noticed that the BIOS reported the CPU clock at 2.4GHz instead of the usual 3.6. So I went to the BIOS MB Intelligent Tweaker to check what had caused the reversion to stock speeds. I noticed that CPU Host Control was DISABLED. So I enabled it again. F10 and save. System powered DOWN! A short time later, the system powered back up and the the clock control was again disabled.
Thinking that maybe it's slightly warmer in here than before (but wondering how a cold system that's been powered off all night could be overheated), I tried walking the clock speed down in 5MHz increments. 395, 390, 385... still shuts off the power... I got it down to 300 and still no startup and then I REALLY got concerned.
So then finally I decided to try the absurd.. I set the clock to 266. The system then booted. Okay, so we know we're good at 266FSB. Let's try 267. Nope! System powers down! So I then try 265, just to see if it's something that is preventing anything but exact stock speeds. It powered down again--at 265MHz FSB!
Obviously, something is seriously wrong with that system now.
BTW, the RAM tests good in MEMTEST86.
The problem is that, as of this morning, the system will not allow the FSB to be adjusted AT ALL. It MUST be exactly 266MHz in order to boot now. That is very strange!
If there are any other Gigabyte GA-P35-DQ6 motherboard owners here, have you experienced this type of failure and if so, what was the cause?