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post #3581 of 10068
You do know that Intels max safe volts for that chip is 1.45 right?
And that is "Intels" max safe. Belive me when you are benching you can go far beyond that, just don't try and get it stable with about 1.65, it won't like it.
As long as your temps are good, put her up to 1.5 or so for a bench run.

Edit: Yep what papa said, it will put less stress on the NB.
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post #3582 of 10068
Quote:
Originally Posted by NoGuru View Post
You do know that Intels max safe volts for that chip is 1.45 right?
And that is "Intels" max safe
I have read that before but on Intels specs website for this chip it states 1.3625v as the max I did up the vcore to 1.5 in bios and still got hung up trying to load at 5GHz

I just tried a HyperPi 32m run at 4.7GHz and a couple minutes into the test I got a restart. No BSOD just a quick black screen then the restart.

Heres my MIT for the 4.7GHz oc

Code:
CPU = E8500
Motherboard = EP45-UD3P
BIOS Version = FE
Ram = G. Skill 2x2GB DDR2 PC2 8000


MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster .............: Auto
CPU Clock Ratio .....................: 9
Fine CPU Clock Ratio.................: 0
CPU Frequency .......................: 4.70GHz


Clock Chip Control 
Standard Clock Control
CPU Host Clock Control...............: Enabled
CPU Host Frequency (Mhz) ............: 523
PCI Express Frequency (Mhz) .........: 100


Advanced Clock Control
CPU Clock Drive......................: 800mV
PCI Express Clock Drive..............: 800mV
CPU Clock Skew.......................: 50
MCH Clock Skew.......................: 50


DRAM Performance Control
Performance Enhance..................: Standard
Extreme Memory Profile (X.M.P.)......: Disabled
(G)MCH Frequency Latch...............: 400MHz
System Memory Multiplier ............: 2.00D
Memory Frequency (Mhz) ..............: 1046
DRAM Timing Selectable ..............: Manual


Standard Timing Control
CAS Latency Time.....................: 5
tRCD ................................: 5
tRP..................................: 5
tRAS.................................: 15

Advanced Timing Control
tRRD.................................: Auto
tWTR.................................: Auto
tWR..................................: Auto
tRFC.................................: 52
tRTP.................................: Auto
Command Rate (CMD) ..................: Auto


Channel A
Static tRead Value...................: Auto

Channel B
Static tRead Value...................: Auto


Motherboard Voltage Control

CPU
Load Line Calibration (LLC) .........: Enabled
CPU Vcore............................: 1.45
CPU Termination.....1.200V*..........: 1.26
CPU PLL.............1.500V*..........: 1.57
CPU Referen.........0.755V*..........: Normal

MCH/ICH
MCH Core............1.100V...........: 1.42
MCH Reference.......0.800V...........: .778
MCH/DRAM Ref........0.900V...........: .970
ICH I/O.............1.500V...........: 1.50
ICH Core............1.100V...........: 1.10

DRAM
DRAM Voltage .........1.800V.........: 2.12
DRAM Termination .....0.900V.........: .910
Channel A Reference ..0.900V.........: .910
Channel B Reference ..0.900V.........: .910
I don't know why my CPU skew was at 50 but I changed it to 100 and I got a BSOD a couple minutes after windows loaded I was web browsing at 4.7GHz with that MIT with a 50 CPU skew for about an hour no problem and even made a few SuperPi runs with no issues.
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post #3583 of 10068
VTT or CPU Term is to low, you should need about 1.32-1.38 and you may have to losen your timings a bit to 6-6-6-18.
What is your ram rated for?

Edit: 1.36 is the max VID that Intel will ship a CPU out of the factory at.

Double edit: This may help a little http://www.overclock.net/intel-mothe...-ep45-ud3.html
Edited by NoGuru - 11/5/10 at 4:38pm
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post #3584 of 10068
Quote:
Originally Posted by NoGuru View Post
VTT or CPU Term is to low, you should need about 1.32-1.38 and you may have to losen your timings a bit to 6-6-6-18.
What is your ram rated for?

Edit: 1.36 is the max VID that Intel will ship a CPU out of the factory at.
I tried upping VTT to 1.4 and CPU term to 1.61 to try and hit 5GHz and didn't help. I even tried MCH at 1.5v with no success. I haven't touched them at 4.7GHz though. My ram is rated at 5 5 5 15 @ 1000mhz @ 2.1v
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post #3585 of 10068
Quote:
Originally Posted by DJ4g63t View Post
I tried upping VTT to 1.4 and CPU term to 1.61 to try and hit 5GHz and didn't help. I even tried MCH at 1.5v with no success. I haven't touched them at 4.7GHz though. My ram is rated at 5 5 5 15 @ 1000mhz @ 2.1v
VTT is "CPU Term" you have to find the sweet spot, try 1.30 and work your way up.
Might need to add some volts to the RAM as well unless you know they will run that fast at those volts.
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post #3586 of 10068
Quote:
Originally Posted by NoGuru View Post
VTT is "CPU Term" you have to find the sweet spot, try 1.30 and work your way up.
Might need to add some volts to the RAM as well unless you know they will run that fast at those volts.
Sorry I meant CPU PLL at 1.61v Duh I know my ram is stable at 4.33GHz running at 1020MHz with those volts and timings. I made about a half dozen HyperPi 32m runs flawlessly and did 8 hours P95 Blend no problems either. That 4.7GHz MIT is basically my 4.33GHz stable oc with a bump in vcore and MCH voltage.
Edited by DJ4g63t - 11/5/10 at 4:49pm
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post #3587 of 10068
Yes but will it do 1112? That is what you need to get to 5GHz. I would drop the multi down to 6 and increase FSB finding your RAMs limit.
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post #3588 of 10068
Quote:
Originally Posted by NoGuru View Post
Yes but will it do 1112? That is what you need to get to 5GHz. I would drop the multi down to 6 and increase FSB finding your RAMs limit.
I don't know if it will do 1112 but thats a great idea I will certainly try. What do you suggest I use to stress test the ram with a 6x multi?

Thanks
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post #3589 of 10068
Quote:
Originally Posted by DJ4g63t View Post
I don't know if it will do 1112 but thats a great idea I will certainly try. What do you suggest I use to stress test the ram with a 6x multi?

Thanks
Use like SuperPi 1m or 2m should be fine.
Good so you understand how to find the max by lowering the multi you take the CPU out of the equation. Also that is how you can find your Max FSB as well.
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The HedgeHog
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post #3590 of 10068
CPU-Z Validation

Getting rather high idle temps though, 50 degress+
Edited by Snips - 11/5/10 at 5:17pm
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