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My overclocking limit?

post #1 of 9
Thread Starter 
I've been slowly overclocking my rig and amazingly, it's able to hold up at 3.501 GHz (E6600). Right now, the setting is at 389MHz with 9x multiplier with vCore of 1.464, and 1556 FSB for mobo with 778 MHz for my DDR2 RAM. (1:1)

It works, I can play source without problems, CoD2 without problems, RS:Vegas without problems.. but sometimes the computer freezes when I'm playing games, rarely though. When I write CDs, there are blank spots or some data is not there, so I'm guessing that I'm losing data when I transfer it onto a CD. When I encode videos to DVD formats for DVD burning, sometimes my system crashes and restarts by itself.

[B]Most importantly, when running Orthos, it runs fine for about 4 - 10 minutes, but then Windows Explorer crashes, and other vital system processes crash also.[B] After those crash and restarts itself, the whole computer freezes, or restarts itself.

I'm guessing my system is not stable at this moment, but I've even tried pushing my vCore to 1.54 and it still crashes on Orthos. I still have no idea how to fix the loss of data when burning CDs such as audio CDs.

I'm wondering whether my processor is unable to handle the speed, or is it the limitations of my motherboard, or just what is keeping me from making this system stable at this speed? (something I forgot to turn off on my BIOS?)
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post #2 of 9
The lost data could be your south bridge not getting enough voltage (something like that)

The instability could be a dozen of things.

So up your southbridge voltage / northbridge (if it's not getting too hot)

Loosen your ram timings a bit, see if that helps.
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post #3 of 9
What do your temperatures look like? Run TAT or CoreTemp (both available in our downloads forum) and check the CPU temperature when running Orthos. Ideally, you'd want that to be below 55°C, and you'd absolutely want it below 60°C. As tlan implied, the Northbridge tends to get pretty toasty when running at higher speeds. You may want to consider some aftermarket cooling for it, especially if you need to up the voltage for stability.

Loss of data is often due to RAM instability. You're showing tighter RAM timings than stock in your profile. Did you up the RAM voltage to compensate? Try running Memtest86 to ensure your RAM is stable at the current settings.
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post #4 of 9
Thread Starter 
When I'm on full load, my temps are around 50-55C. I've only seen it at 57C just once. I've up-ed the voltage for my Northbridge from stock 1.25 to 1.4V. I have a fan on the Northbridge heatsink and I'm sure it's not running super hot. I haven't touched the Southbridge voltage as I'm not sure what is recommended for the Southbridge.

Regarding my RAM, Kingston HyperX website recommends that I use 4-4-4-12 1T timings at 2.00V. It is detected as a 5-5-5-15 timing RAM, but since the manufacturer recommends different timings, I went with the recommended values. I haven't ran Memtest86 yet and it's difficult to write onto a CD due to the loss of data that I am suffering from.
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Hard DriveOSMonitorPower
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post #5 of 9
Thread Starter 
Also, I was able to burn Memtest86+ v1.7 onto a CD. So I ran it and it passed the test twice, which I'm assuming is fine. So since my RAM timings are out of the picture, what is causing me to lose stability?
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Intel Core 2 Duo E6600 2.4 GHz @ 3.50 GHz MSI P6N SLI PLATINUM EVGA Nvidia GeForce 7950GT Superclocked Kingston HyperX 2GB (2 x 1GB) 240-Pin DDR2 
Hard DriveOSMonitorPower
Seagate Barracuda 320GB 7200 RPM SATA 3.0 Gb/s Windows XP Professional SP2 Samsung 19 In. SyncMaster 931B OCZ GameXStream ATX12V 700W 
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post #6 of 9
I was just having a similar problem. My system was dual orthos stable and memtest86 stable, but it would crash in games and 3dmark06. I pinpointed the RAM because the looser I set the timings the better it got. I came to find that my RAM was actually shot, but try some looser timings and 2.1v and see what happens. Good luck
    
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post #7 of 9
Thread Starter 
What do you recommend the timings to be? Should I still keep mine at 4-4-4-12 but 2T? Or should I change it to 5-5-5-15 with 1T? And I'd rather stick with my current voltage of 2.0V.
1st Build
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CPUMotherboardGraphicsRAM
Intel Core 2 Duo E6600 2.4 GHz @ 3.50 GHz MSI P6N SLI PLATINUM EVGA Nvidia GeForce 7950GT Superclocked Kingston HyperX 2GB (2 x 1GB) 240-Pin DDR2 
Hard DriveOSMonitorPower
Seagate Barracuda 320GB 7200 RPM SATA 3.0 Gb/s Windows XP Professional SP2 Samsung 19 In. SyncMaster 931B OCZ GameXStream ATX12V 700W 
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1st Build
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CPUMotherboardGraphicsRAM
Intel Core 2 Duo E6600 2.4 GHz @ 3.50 GHz MSI P6N SLI PLATINUM EVGA Nvidia GeForce 7950GT Superclocked Kingston HyperX 2GB (2 x 1GB) 240-Pin DDR2 
Hard DriveOSMonitorPower
Seagate Barracuda 320GB 7200 RPM SATA 3.0 Gb/s Windows XP Professional SP2 Samsung 19 In. SyncMaster 931B OCZ GameXStream ATX12V 700W 
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post #8 of 9
Seems like a stupid question...

But have you locked your pci and PCIe busses, if not that'll get your data corrupted fo sure
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Core 2 Here i Am
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Intel E2140 @ 3,0Ghz Gigabyte P35-DS3R Asus Geforce 7600GT @ 660Mhz 2Gigs CheapAss Buffalo 
Hard DriveOptical DriveOSKeyboard
500GBx2 Seagate 7200.11 Raid0 Samsung DVD-RW Windows Vista x64 Ultimate M$ Wireless 
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post #9 of 9
Try setting your memory timings to auto for the time being just to see if it helps.
    
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CPUMotherboardGraphicsRAM
Q6600 Asus P5K green P35 HIS Radeon 5670 4GB Corsair XMS2 DDR2 800 
Hard DriveOptical DriveOSMonitor
WD 320GB Hitachi 80GB CDRW & DVDROM XP 21" Viewsonic 
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