X6800 OCing need help from the PROS

[Csst]

Ok i have try everythig under the sun to get this to work i'm very new at this and i'll explain everything i have done so far. First off here are my settiings.

CPU Clock Ratio 11X
CPU host clock control (disable)
CPU host Frequency (MHZ) Auto
PCI Express Frequency(MHZ) Auto
C.I.A.2 (disable)
System Memory Multiplier (Auto)
-->This next part i have no clue what to put it at maybe some help would be great.
DRAM Timing Selectable (AUTO)
xCAS Latency Timeing (AUTO)
xDRAM RAS# to CAS# Delay (Auto)
xDRAM RAS# Precharge (Auto)
xPrecharge delay (tRAS) (Auto)
xAct to Act Delay (Auto)
xRank write to read Delay (auto)
xWrite to Precharge Delay (auto)
xRefresh to ACT Delay 0
xRead to Precharge delay (Auto)
-------------------------------------------
Memory Performance Enhance Normal
DIMM Overvolage Control Normal
PCI-E Overvolage Control Normal
FSB Overvoltage Control Normal
(G) MCH Overvoltage Control Normal
Normal CPU Vcore 1.32500V
Robust Graphics Booster (Auto)
--------------------------------------------
ok now this is what i have done so far i have set my USB legancy to disabled
and also set my PCI express to 100mhz i have also have try to go to a muitlplier of 12X to see if i can get a better OC but i have try a 11X with a 320Mhz Frequency to get me my 3.520mhz of course my System Multiplier is set at 2.0 and i have also try to put my MCH to +.01 and my DIMM Overvoltage to .01 also and also have try to bump up my Vcore to 1.375 and set it at that i have no idea what else to change but i can boot into windows just fine but when i run a stress test (ORTHOS) it just stops after about 3 to 4 mins i can get it to 3.4 it seems and i ran the stress test and it ran for about 9 hours and seem to be going fine. but can't get any higher than that. Also just so you all know i'm on water cooling also to keep my temps in check on idle i'm at about 32C and underload about 41C. Iw ould love to have a little help from the pros if i'm surpost to chnage the DRAM timing becuase i don't know the first thing to change there to get the best performance all my hardware i use it listed below. Thanks

Csst

 

[cmdrdredd]

You need to manually set the volatge and timings of your memory. Set voltage to 2.1 and timings to 5-5-5-12 and see how it goes. The memory is the biggest problem for C2D overclocking.

 

[JAG87]

I dont understand what the problem is.

step 1
Make sure all your voltage/cpu clock utilities such as EIST are OFF.

step 2
Put vcore to 1.425

step 3
Put multi to 13x

step 4
enjoy 24/7 air cooled 3.46 Ghz Core 2 Duo.


If you want to go a little further than that you need to start adjusting FSB. bumping the multiplier again to get 3.73 Ghz wont work that well on air... so begin by setting your memory timings in the BIOS (instead of auto). For example punch in 4-4-4-12. Then set vDimm to +0.1 vMCH to +0.1 vICH to +0.1 and vFSB to +0.1. Now start bumping your FSB by 4mhz increments. Test for stability everytime you boot. Once you hit instability, start bumping your vcore (DO NOT go over 1.5 on air). If you are still unstable bump all the +0.1 to +0.2.

Find the maximum clock you can squeeze out of your cpu. To my experience you will probably max out around ~3.6 if you go higher on air than you got a special chip.

 

[Csst]

ok i set my all my timings and now i'm happy i'm at 3.5 ghz and i have my muilt at 11 still and went to 319 FSB and ran the stress test for about 15 hours and was still going strong my temps are at 37 idle and about 50 underload i think i'm ok.

Thanks for all your help
Csst

 

[Csst]

i have given up this has been driven me CRAZY!! i have tried everything i can imagine i really don't understand why i can't get this thing past 3.5 for the life of me. the odd thing is i'm at 2.5 now and i'm running a Vcore of 1.325 and everything is at stock i try to go to 3.6 every way i can think of it boots into windows fine but run the stress test stop after about 20 secs i have bump up the vcore to 1.425 bump vdimm +1 MCH+1 and ddr +1 and i still can't get it past that. i have try a muilt. of 11, 10 and 9 but i'm not sure if i can go any higher than a 400 on my FSB speed? Also i don't know much at all about the timing on my memory i'm kinda clueless when it comes to this i have it manual set to factory which is 5-5-5-12. one time i try to change it to 4-4-4-12 and the PC wouldn't even post. I really don't understand how i can go to 3.5 without even touching anything and moving everything up and can't get any better results

 

[Shimmishim]

try bumping your voltage up to 1.475 or even 1.5

your temps look good.

you might just need more voltage.

try 10 x 360 with 1.475 volts

leave your timings on BY SPD or manually set to 5-5-5-15

put vmch at 1.5 or 1.55.

try vdimm at stock voltage (whatever it is) + 0.1.

oh also make sure you NB strap is set to 1066 (if it has it).

 

[Technonut]

Try lowering the FSB and raising the multiplier.... I knocked mine back to 264, (264.5 CPUZ) and raised the multiplier to 14 to run 3.7GHz.

I had the RAM timings @ 5-5-5-15 when dialing-in the higher multiplier, then went back and tightened them up after I stability tested the processor OC...

EDIT: 3.7GHz is 25 hours Orthos stable in my rig @ 1.48v (idle )... drops to below 1.45v (Orthos loaded).

 

[JAG87]

yea your honestly not going far with 1.425 volts. After you pass 3.46 ghz, core 2 starts sucking volts like crazy. I had it at 3.9 ghz with 1.52v, looked okay but turned out unstable. Then I had it at 3.73 with 1.52v, looked okay and again turned out bad. Finally I decided to try 3.6, turned out stable at 1.52v, and right now I have it stable at 1.5v.

Once I get a stable OC at a certain frequency, I always try to lower the voltage until my OC becomes unstable again. I have noticed that anything above 3.6 really needs a lot of volts to be stable, many more volts than Id like to put in it. So dont be to dissappointed with 3.5 ghz. Its a good OC.