Overclock.net › Forums › Intel › Intel - General › 500FSB OC Problems
New Posts  All Forums:Forum Nav:

500FSB OC Problems

post #1 of 4
Thread Starter 
System:
GA-EP45T-UD3LR motherboard
Intel Q9400 Quad Core Processor
OCZ Patriot DDR3 LV RAM @ default 1.65 volts, default 7-7-7-20 timings, advertised 1333mhz.
Nvidia 8800GT
600 WATT PSU

For about a year, I was stable at 3.44ghz (430FSB x 8). A little over a month ago, I received some new cooling equipment. I was able to push my Q9400 to 4 ghz (500FSB x 8) with temps at 59-60C. For about a month, I ran fine with no crashes, lockups, or anything pinting toward an unstable system. I ran prime95 and passed overnight on SmattFTTs. I unfortunately never thought to run the blend test.

So a month goes by, and no I'm getting daily kernel panics in Mac, and daily BSODs in windows- the crashes are therefore not software related. So I unplug all USB devices except for my mouse and keyboard, along with unused hard drives. I've tested my hard drive, run memtest (each stick individually, overnight), and all that good stuff- everything passes.

So then I run blend test, and it fails in about 7-10 minutes. Now, I cannot say whether it would have failed a month ago when I first overclocked, BUT, I did not crash once for the first several weeks of running at 500FSB. Only recently did I start to crash DAILY. Therefore, I suspect that something was damaged in this time period, and I am now facing the effects of this damage.

On my Gigabyte motherboard, I ONLY changed a few settings, many were set on AUTO, which as far as I know, adjusts voltages and settings according to my OC. This may be the culprit...

Vcore was changed to 1.325 volts, which was enough to allow small FTTs to pass. termination, PLL, reference, MCH voltages- all lest on auto. The RAM timings and voltages were set according to factory defaults. The memory multiplier was set at 2.66D, which brings be to 1333mhz.

I should note that with these settings, my northbridge heatsync is hot to the point that you will literally burn your skin if you touch it for more than half a second. I'm starting to think that the northbridge may have been damaged. Is there any way to narrow down the problem more? I've been using custom tests on pyime95 and linx, and I fail them consistently. Sometimes tweaking the MCH voltage can make me last longer in prime95, but I still fail/BSOD eventually. I've been testing everything for 2 weeks now, and I haven't made any significant progress. Thanks so much for helping me out with this, your opinions and suggestions will help a lot!

PS. Everything is under warranty. If something is damaged, it can be replaced. I just need to pinpoint where the damage is.
post #2 of 4
what i would do is experiment with all voltages without killing. because AUTO voltage likes to overvolt everything, this may be the cause. Also point some fans on the Northbridge to cool it a bit and it should be fine.
Maybe the chip degraded a bit?

GL
post #3 of 4
Max safe voltage for 45nm Intel Core 2 Quad is 1.45v so you're well within the safe zone.

If you can pass small FTTs then your CPU is fine as FTTs is used to sress the CPU only.

If you're failing blend then it's memory/chipset related.
post #4 of 4
You shouldn't use auto voltages for termination, PLL and MCH, that will put voltages much too high. This thread might be helpful : http://www.overclock.net/intel-mothe...-ep45-ud3.html
Edited by mm67 - 2/27/11 at 11:21am
Shinobi XL
(11 items)
 
Cosmos 2
(9 items)
 
Raven RV03
(8 items)
 
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Asrock Z77 OC Formula XFX Radeon HD 7870 XT Kingston HyperX Predator 2400 MHz 2*4 GB 
CoolingCoolingOSPower
EK Supreme HF EK-VGA Supreme HF Windows 7 Ultimate  Silverstone 1200W Strider Gold Evolution v2.0 
Case
Cooler Master Cosmos II 
  hide details  
Reply
Shinobi XL
(11 items)
 
Cosmos 2
(9 items)
 
Raven RV03
(8 items)
 
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Asrock Z77 OC Formula XFX Radeon HD 7870 XT Kingston HyperX Predator 2400 MHz 2*4 GB 
CoolingCoolingOSPower
EK Supreme HF EK-VGA Supreme HF Windows 7 Ultimate  Silverstone 1200W Strider Gold Evolution v2.0 
Case
Cooler Master Cosmos II 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel - General
Overclock.net › Forums › Intel › Intel - General › 500FSB OC Problems