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E6850 Overclocking

post #1 of 13
Thread Starter 
So, I decided to swap out for an E6850 from me E5200. Overclocking has become a nightmare

First off, I got to 3.3Ghz, stock voltage FINE.

3.6GHz, 1.45V, Temps were good.

Anything over and I cannot get stable.

Been a while since I have needed to use VTT and Northbridge voltage settings, so can anyone help me at all?

I just want to know what the maximum voltages are for 65nm C2D and P45 Platinum board. (FSB, VTT, GTL, VCORE, the lot)

Also, It's not my memory thats the limiting factor, Voltages are above stock and devider is at a 1:1 ratio.

I currently have the overclock at:

Vcore: 1.48V
FSB: 461MHz x8 (CPU Speed 3.7GHz)
VTT: 1.44V
Northbridge: 1.36V

and thats it I think.

EDIT: Stability failed with above settings.

EDIT 2:

Started again, Settings are as follows:

FSB: 378MHz x9 (3.402GHz)
CPU Voltage: 1.45V
DRAM: 2.1V
MCH: 1.208V
VTT: 1.20V

Test ran stable. Going for 400MHz FSB for a 3.6GHz cpu speed.

EDIT: 3.

400MHz FSB Ran stable with previous voltage, Trying 410MHz now.
Edited by Buzzin92 - 8/11/11 at 5:05pm
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post #2 of 13
Thread Starter 
What the hell is wrong with this!? As soon as I step over 400MHz FSB in BIOS BAM!, Fail stress test. Even though in windows the FSB is reporting at 402MHz. Could this be a BIOS problem?
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post #3 of 13
try your 461mhz FSB settings again.. with only 1.4v VTT and a lower multi... see if CPU passes stress tests..

*for 65nm you really shouldnt need more than 1.4vtt below 500FSB unless your clocking a Q4
post #4 of 13
Thread Starter 
okay, trying it now.
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post #5 of 13
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Okay, was stable at 461x6

EDIT: trying 500x6, so far in windows << failed
Edited by Buzzin92 - 8/11/11 at 9:15pm
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post #6 of 13
sounds like your vtt, MCH and DRAMv are doing ok ..as your holding stability with the lower CPU clock.. you will just need to focus on GTL's for the 2nd core and vcore settings to get it stable once you find your sweet spot for FSB/RAM speed.

*Make sure you are setting Static tRead or Performance level manually in your BIOS too.. Use PL#10 for +500mhz FSB.. PL#9 can run very tight/stable around 480-490mhz FSB too with faster RAM divider [if you cannot get ~520mhz FSB or so.. you may consider lowering it to this point].
post #7 of 13
Thread Starter 
Quote:
Originally Posted by CL3P20 View Post
sounds like your vtt, MCH and DRAMv are doing ok ..as your holding stability with the lower CPU clock.. you will just need to focus on GTL's for the 2nd core and vcore settings to get it stable once you find your sweet spot for FSB/RAM speed.

*Make sure you are setting Static tRead or Performance level manually in your BIOS too.. Use PL#10 for +500mhz FSB.. PL#9 can run very tight/stable around 480-490mhz FSB too with faster RAM divider [if you cannot get ~520mhz FSB or so.. you may consider lowering it to this point].
Thanks so much! I'm currently testing 500*6 with VTT at 1.42V and MCH 1.44V (Think my northbridge sink can handle these voltages, even if they're too high) If stress fails I'll go change the static tRead and loosen the timings a little.

EDIT:

500x6 was successful, trying 510MHz now
Edited by Buzzin92 - 8/11/11 at 9:36pm
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post #8 of 13
np! - just remember - your NBv will scale with latency.. so measure as you go. it will make troubleshooting much easier when you understand [roughly] just how much NBv = 'x' amount of latency

ie- you may find your latency to be ~52ns or so now..and stable using 1.44v MCH..but find that tightening latency [regardless of if you use RAM timings, PL# or FSB] down to ~49-50ns requires 1.48v ...
post #9 of 13
Thread Starter 
Quote:
Originally Posted by CL3P20 View Post
np! - just remember - your NBv will scale with latency.. so measure as you go. it will make troubleshooting much easier when you understand [roughly] just how much NBv = 'x' amount of latency

ie- you may find your latency to be ~52ns or so now..and stable using 1.44v MCH..but find that tightening latency [regardless of if you use RAM timings, PL# or FSB] down to ~49-50ns requires 1.48v ...
Okay I seem to be having problems at 510MHz, Keeps freezing as soon as I get into windows. I changed what I thought would be the tRead on both channels to 10 and The computer froze during POST. (assuming the tRead is tRD?)
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post #10 of 13
Hmm.. i think for your BIOS its called 'trd phase' .. I believe the other timings in the "channel" section are your sub-timings for read and write delays [these can bring BIG boosts in bandwidth, so long as you can run them stable].

*510fsb = RAM @ 1020mhz... I would try running 'Auto' timings..and only setting trd Phase manually to see what timings the mobo is liking for this new range of speed. If the timings and latency dont move much [make sure you measure latency before and after you set the timings to Auto].. you may need to start adjusting MCHv and MCH GTL.
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