Mattb2e

Im pretty sure that the E8500's are still at the older revision, which is C0 where as my chip is at the E0 revision, thats one reason why. The other possible reason is just the simple fact that some batches are better than others, some chips overclock well and some need massive amounts of voltage in order to do so.

Heres what I would do, take vcore completly out of the equation by disabling LLC, set your vcore to 1.3625 and see if you can maintain some stability. Monitor your temps as your temps may get a bit high at that voltage setting. If your temps are good and your stable for several hours, bring down vcore a couple notches at a time until your unstable, then bring it back up 1-2 notches.

If for some reason your still unstable with 1.3625v in bios then you know its not cpu related and you can isolate it to either NB or Ram.

__________________
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Thermal Compound Application Instructions:
http://www.arcticsilver.com/arctic_s...structions.htm

Intel E8400 Club

Shado

I have a Revision E0 E8500, that's one reason I'm a little frustrated with it.

I'm gonna give it another run tonight with MCH lowered to 1.2V. For some reason my board seems to have problem when my MCH is set higher (like 1.3V). I would have a bootable setting with 1.26V and when I up it to 1.3V, it wouldn't even boot and would sometimes hang in BIOS.

Mattb2e

I found this site, it gives you default voltages for all your settings on your motheboard.

http://www.hardwarecanucks.com/forum...-review-7.html

I also found during some reading that generally you only need adjust mch core by .1v for around ~450mhz fsb

__________________
"Being wrong is erroneously associated with failure, when in fact to be proven wrong should be celebrated. For it is elevating someone to a new level of understanding, furthering awareness."

"Always question the recieved reality, the consensus reality is often intentionally misleading"

Thermal Compound Application Instructions:
http://www.arcticsilver.com/arctic_s...structions.htm

Intel E8400 Club

Shado

My E8500 is now stable for 8.5 hours (stopped by me) with the current settings. I just hope it doesn't stop POSTing again after I unplug it from the wall.

Robust Graphics Booster.........................[ Auto ]
CPU Clock Ratio.................................[ 9 ]
Fine CPU Clock Ratio............................[ 0 ]
CPU Frequency 4.35GHz...........................[ 445 x 9 ]

******Clock Chip Control******

CPU Host Clock Control..........................[ Enabled ]
CPU Host Frequency (Mhz)........................[ 445 ]
PCI Express Frequency (Mhz).....................[ 100 ]
C.I.A 2 [Disabled]

******Advanced Clock Control******

CPU Clock Drive.................................[ 800mv ]
PCI Express Clock Drive.........................[ 900mv ]
CPU Clock Skew..................................[ 0ps ]
MCH Clock Skew..................................[ 0ps ]

******DRAM Performance Control******

Performance Enhance [Turbo]
Extreme Memory Profile (XMP)....................[ Auto ]
(G) MCH Frequency Latch.........................[ Auto ]
System Memory Multipler.........................[ 2.40B ]
Memory Frequency 1066...........................[ 1068 ]
DRAM Timing Selectable..........................[ Manual ]

CAS Latency Time................................[ 5 ]
tRCD............................................[ 5 ]
tRP.............................................[ 5 ]
tRAS............................................[ 15 ]



******Motherboard Voltage Control******

Load-Line Calibration [Enabled]
CPU Vcore [ 1.200 ].............................[ 1.3000 ]
CPU Termination [ 1.20 ]........................[ 1.26 ]
CPU PLL [ 1.50 ]..................................[ 1.50 ]
CPU Reference [ 0.766 ].......................[ 0.798 ]

MCH Core [1.1 ]....................................[ 1.2 ]
MCH Reference [0.760 ]........................[ 0.798 ]
MCH/DRAM Refernce [0.900 ]..................[ .900]
ICH I/O [1.500 ]...................................[ 1.50 ]
ICH Core [1.100 ]...................................[ 1.1 ]

DRAM Voltage [1.800 ]...................[ 2.10 ]
DRAM Termination [0.900 ]...................[ .9]
Channel A Ref [0.900 ]...................[ .9]
Channel B Ref [0.900 ]...................[ .9]

Mattb2e

So maybe the MCH voltage being too high screwed you up?

__________________
"Being wrong is erroneously associated with failure, when in fact to be proven wrong should be celebrated. For it is elevating someone to a new level of understanding, furthering awareness."

"Always question the recieved reality, the consensus reality is often intentionally misleading"

Thermal Compound Application Instructions:
http://www.arcticsilver.com/arctic_s...structions.htm

Intel E8400 Club

Shado

I don't know, but I do notice abnormality when my MCH is set too high. But then I see people reporting having MCH of 1.4V and their machine would still function.

Gonna play around with it and report back later. Thanks everyone for the help, and specially MattB

Shado

My E8500 @ 4.2 ghz was 9 hours OCCT stable (had to go to work, stopped it before I left) with the following settings.

EDIT: Does it look/sound like a safe, 24/7 OC with these voltages?

Robust Graphics Booster.........................[ Auto ]
CPU Clock Ratio.................................[ 9 ]
Fine CPU Clock Ratio............................[ 5 ]
CPU Frequency 4.2GHz...........................[ 444 x 9.5 ]

******Clock Chip Control******

CPU Host Clock Control..........................[ Enabled ]
CPU Host Frequency (Mhz)........................[ 444 ]
PCI Express Frequency (Mhz).....................[ 100 ]
C.I.A 2 [Disabled]

******Advanced Clock Control******

CPU Clock Drive.................................[ 800mv ]
PCI Express Clock Drive.........................[ 900mv ]
CPU Clock Skew..................................[ 0ps ]
MCH Clock Skew..................................[ 0ps ]

******DRAM Performance Control******

Performance Enhance [Turbo]
Extreme Memory Profile (XMP)....................[ Auto ]
(G) MCH Frequency Latch.........................[ Auto ]
System Memory Multipler.........................[ 2.40B ]
Memory Frequency 1066...........................[ 1066 ]
DRAM Timing Selectable..........................[ Manual ]

CAS Latency Time................................[ 5 ]
tRCD............................................[ 5 ]
tRP.............................................[ 5 ]
tRAS............................................[ 15 ]



******Motherboard Voltage Control******

Load-Line Calibration [Enabled]
CPU Vcore [ 1.250 ].............................[ 1.36250 ]
CPU Termination [ 1.20 ]........................[ 1.26 ]
CPU PLL [ 1.50 ]..................................[ 1.50 ]
CPU Reference [ 0.766 ].......................[ 0.798 ]

MCH Core [1.1 ]....................................[ 1.2 ]
MCH Reference [0.760 ]........................[ 0.798 ]
MCH/DRAM Refernce [0.900 ]..................[ .900]
ICH I/O [1.500 ]...................................[ 1.50 ]
ICH Core [1.100 ]...................................[ 1.2 ]

DRAM Voltage [1.800 ]...................[ 2.10 ]
DRAM Termination [0.900 ]...................[ .9]
Channel A Ref [0.900 ]...................[ .9]
Channel B Ref [0.900 ]...................[ .9]

Mattb2e

Looks like it might be stable however I would change the Pci-Express clock drive back to default, change your ICH core to 1.1 as you shouldnt need more SB voltage for where your at. How are your temps?

__________________
"Being wrong is erroneously associated with failure, when in fact to be proven wrong should be celebrated. For it is elevating someone to a new level of understanding, furthering awareness."

"Always question the recieved reality, the consensus reality is often intentionally misleading"

Thermal Compound Application Instructions:
http://www.arcticsilver.com/arctic_s...structions.htm

Intel E8400 Club

Shado

I lowered the ICH to 1.1 and did another 10 hour OCCT on high priority and large data set and pass. I think I'm going to call it at 4.2Ghz.

I'm reading a lot of discussions about degradation at sustained high voltage. Does 1.3625V BIOS (1.33V CPUZ reading) sound like it's going to cause degradation? Again, the temperature is no more than 60C under OCCT stress test.

darklink

Considering that your still within the thermal specs established by Intel and the temps are good, then I would say degradation will be minimal if any at all. It still seems like you should be able to get to 4.2GHz without as much voltage but overall settings do vary from chip to chip. Anyway.... everything seems to be in order. Glad everything is workin out for ya

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