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It's so difficult to reach 3.6 in a E6600...

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February 5, 2007 11:48:18 PM

...at least for me. I can reach 3.55 easy and stable @ 1.42V but to pass 800Mhz (DDR 1:1) I increased the volt. to almost 1.5, and still is not stable (TAT crashes after some minutes). I increased my ram V in 0.3, MCH and FSB in 0.3 too, but still can't get to 3.6 stable.

Is there something I'm doing wrong?

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February 7, 2007 12:25:04 AM

Have you tried flashing the BIOS?
February 7, 2007 12:30:43 AM

Yes I have version 10 (newest). I have heard that version 7 is pretty good, but never have tried it.
Related resources
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February 7, 2007 12:37:43 AM

Newer isn't always better, so if you flash back (no pun intended) to 7, it's well worth the effort if it solves your problem. I'm running 1305 instead of the current 1707 on my P5W DH due to stack overflow errors, so the BIOS bugs don't bite me

Hope this helps. 8)
February 7, 2007 12:41:38 AM

Yeah well the F7 BIOS is know for being a good overclocking BIOS, but it has some issues with cold boots (the BIOS resets itself for no reason). That was corrected in F10. But maybe it worths a try...
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February 7, 2007 12:54:20 AM

You're so close, so if you can get past this speed bump, your Vcore at 1.42 is still low enough to allow you to make 3.6 at 1.45 or so, without overtemping. If you're running at the stock multiplier of 9 x 395, you may be stuck on an FSB bump, so you could try 8 x 450 @ 1.45 Vcore.

Also, check out the following topic:

Core 2 Duo Temperature Guide

Hope this helps. 8)
February 7, 2007 1:07:37 AM

I will try moving the multiplier now and will post the results
February 7, 2007 1:23:00 AM

I tried 8 X 450 @ 1.45 and was able to run TAT for about 10 minutes but after that the PC rebooted :-(. The temp was stable at 65º 64º at that time, idling @ 44.
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February 7, 2007 1:23:12 AM

Excellent! :D 
February 7, 2007 1:24:38 AM

But crashing after 10 minutes of TAT doesn't mean that I'm pretty much unstable?
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a b K Overclocking
February 7, 2007 1:27:45 AM

Sounds like a bit more Vcore may stabilize your system. Try 1.475, and perhaps another .01 bump on Vmch may also help. 8)
February 7, 2007 1:29:15 AM

I'll try 1.475. Vmch is already +0.3 :o 
a b à CPUs
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February 7, 2007 1:33:43 AM

That may be enough to attain stability. 8)
February 7, 2007 1:48:13 AM

I had to pump my vcore up to 1.55 to be stable @ 3.6 / 3.7
February 7, 2007 1:48:42 AM

Ok, TAT ran for 15 minutes without any problems. The only problem is that the CPU was @ 68º loaded, and that's with a Tuniq Tower.... I don't think that extra 50mhz worth an extra 6 or 7º in temps... 3.7 or more, that's another story...
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February 7, 2007 1:53:11 AM

At least you got past the 395 speed bump. You're probably pushing against temps at 3.7 with 1.55. Can you reach stability at 3.6 with 1.4875 or 1.5?
February 7, 2007 1:56:02 AM

I'm stable 3.6 @ 1.475
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February 7, 2007 2:00:47 AM

So 8 x 450 solved the puzzle?
February 7, 2007 2:03:05 AM

It did, because before I wasn't stable even @ 1.475. Now it's stable. But the temps concern me a little. Now I'm idling @ 48. Maybe I should check my Tuniq and reapply some AS5.

BTW, isn't 1.475 a lil bit high for the CPU?. It won't short the processor's life?
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February 7, 2007 2:07:37 AM

Read the link above for the C2D Temp Guide, but the short answer is 1.475 is less than a 10% overvolt, which is fine as long as you can stay within the thermal envelope. :D 
February 7, 2007 2:12:32 AM

Quote:

Just because you can boot to windows and surf the net for a few hours doesn't mean your truly stable.

If your memory is Overclocked you also need to check it for stability.


That's true, but for me stability means to run without crashes. That depends of course of the tasks you perform with the rig. I'm a heavy gamer, so I think stability to me means play for hours without crashes.

Thanks Tronix for your help (also thanks to everybody)... Now I can aim for 3.7 :p 
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February 7, 2007 2:13:33 AM

Quote:
If your memory is Overclocked you also need to check it for stability.


Good point, since he changed FSB from 395 to 450. 8)
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February 7, 2007 2:15:42 AM

Your very welcome, and don't forget to update your profile! :D 

Enjoy! 8)
February 7, 2007 2:17:22 AM

Done :D 

One question, why I was able to reach the speed with the 8X, and not the 9X?. What was holding me back?
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February 7, 2007 2:25:13 AM

Some 965 chipsets motherboards have FSB speed bumps, or clock regions which are unstable, for example 390 through 430. Sometimes all it takes is driver updates, but more typically, it requires leapfroging over the uncooperative clock regions. However, as RobsX2 pointed out, don't forget to tweak Vdimm and / or timings for stability at DDR2-900.

Quote:
Now I can aim for 3.7


Typically, above 1.35 Vcore, each .05 increase = ~ 100 Mhz increase, and ~ 3c temp increase. 8)
February 7, 2007 4:01:52 AM

I reinstalled my Tuniq and now the temps are 3º lower. So I think I'm ok for now. :) 
February 7, 2007 12:55:13 PM

Yes, I'm using AS5... I expect that after the curing process I will gain a couple degrees more... (less) lol.

I know what are you saying about the corrupted system, mostly by RAM issues. I will run Prime95 tonight until tomorrow to check stability, but I think it should be ok, since TAT is A LOT more stressful than Prime.
February 7, 2007 1:12:05 PM

TAT is the "Intel Thermal Analysis Tool" and is a program that absolutely puts the more pressure in your CPU I have seen. It puts both cores @ 100% all the time. You will see temps up to 10º more here than in Prime or Orthos. A link is HERE
February 7, 2007 1:18:25 PM

I'd also mention that the ds3 likes to have air blown on the passive northbridge...
February 7, 2007 1:33:02 PM

Is kinda difficult to put a fan in the top of the NB, because the Tuniq is SO HUGE it blocks some of it. But yes, would be nice. Later I will decrease my NB overvolt in 0.1, to see if I remain stable after that. I have heard that the DS3 can reach high speeds even with the NB @ stock speed.
February 7, 2007 1:47:54 PM

Quote:

Dual P95 also loads both cores at 100%. Anyway I just ran Tat for a few minutes and the temps I get are just like those under dual p95, thats what I expected it would do.


You should tell me how you do it, because if I run 2 instances of Prime, each one assigned to a core, I just get 55-56º loaded, when I get 66º in TAT. If I check the Task Manager I can see each core is 50% pushed, when in TAT is 100% pushed.
February 7, 2007 2:05:00 PM

I do, but in Task Manager I see the 2 versions of Prime just @ 50% each one. 8O
February 7, 2007 2:22:14 PM

Well, I can use Prime to test 50% and TAT to test 100% then :p 
February 7, 2007 2:23:06 PM

Quote:
Excellent! :D 

Quote:
I tried 8 X 450 @ 1.45 and was able to run TAT for about 10 minutes but after that the PC rebooted . The temp was stable at 65º 64º at that time, idling @ 44.


Hi, what is a normal temp for overclocked CPUs?
thanks!
February 7, 2007 2:32:10 PM

Quote:

Hi, what is a normal temp for overclocked CPUs?
thanks!


Of course, the lower the better. Computronix wrote a good guide about it. Basically you need to be under 60.1º @ load in the BIOS, and under 50º to be absolutely safe. 50º measured by the BIOS means about 70º in some testing tools like TAT, or 65º in Core Temp. Anyway, find it by yourself HERE
February 7, 2007 3:15:14 PM

Quote:

Hi, what is a normal temp for overclocked CPUs?
thanks!


Of course, the lower the better. Computronix wrote a good guide about it. Basically you need to be under 60.1º @ load in the BIOS, and under 50º to be absolutely safe. 50º measured by the BIOS means about 70º in some testing tools like TAT, or 65º in Core Temp. Anyway, find it by yourself HERE

Thanks for the info.
My temps are a little high (400 fsb, 8x). Make sense to lower the core volts a little (from the automatic setting)? I tried this before and it seems stable. I got a good expensive ZALMAN cooler, it should be better than a stock cooler.

Some Artic Silver 5 should help :D 
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a b K Overclocking
February 8, 2007 4:08:09 AM

Quote:
My temps are a little high (400 fsb, 8x). Make sense to lower the core volts a little (from the automatic setting)? I tried this before and it seems stable. I got a good expensive ZALMAN cooler, it should be better than a stock cooler.

Some Artic Silver 5 should help


Here's something much better than AS5:

DaClan Review: Thermal Interface Shootout

Hope this helps.

Comp 8)
February 8, 2007 4:24:00 AM

Tronix, I'll take a closer look at that paste... Maybe that's the one to get now... My AS5 tube is almost finished... so... :wink:
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February 8, 2007 4:48:10 AM

Quote:
Tronix, I'll take a closer look at that paste... Maybe that's the one to get now...


It's under my ACF7 Pro. It works as advertised in Ninja's review. I'm seriously impressed. My temps dropped 4c. I'm still fascinated with the CPU temp graph in SpeedFan. :D 
February 8, 2007 1:38:02 PM

And what about the "Coollaboratory Liquid Pro"? I was researching the Shin Etsu and found this. The review in Overclock3d.net is pretty brutal....

Battle of the Goop
February 9, 2007 12:00:12 AM

Quote:
My temps are a little high (400 fsb, 8x). Make sense to lower the core volts a little (from the automatic setting)? I tried this before and it seems stable. I got a good expensive ZALMAN cooler, it should be better than a stock cooler.

Some Artic Silver 5 should help


Here's something much better than AS5:

DaClan Review: Thermal Interface Shootout

Hope this helps.

Comp 8)

Thanks for the info. I will check the other grease when my AS5 runs out. How fast are you able to get your E6600 with AS5 ?
February 9, 2007 4:39:22 AM

Quote:
If your memory is Overclocked you also need to check it for stability.


Good point, since he changed FSB from 395 to 450. 8)
Technically he's @ 506mhz NB fsb 8)
February 9, 2007 4:43:47 AM

Quote:
Done :D 

One question, why I was able to reach the speed with the 8X, and not the 9X?. What was holding me back?


there's a NB strap deadspot. you would have gotten stable again @ 401. by reducing the multiplier, you increased the NB fsb to 450, though your setting is 400 mhz.
February 10, 2007 4:33:08 AM

Hi
I think this is on topic.
I got my E6400 running smoothly and 45c at 3.2 Ghz (finally).
However, my RAM is still CL6 ! I have 2 gigs Corsair 6400C4 which should do MUCH better, like CL4 at 400 Mhz.
Just forcing the timing to 4-4-4-12 caused a crash.
How can I slowly adjust the RAM until it's tweeked?
Thanks!
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February 10, 2007 5:38:30 AM

Quote:
...at least for me. I can reach 3.55 easy and stable @ 1.42V but to pass 800Mhz (DDR 1:1) I increased the volt. to almost 1.5, and still is not stable (TAT crashes after some minutes). I increased my ram V in 0.3, MCH and FSB in 0.3 too, but still can't get to 3.6 stable.

Is there something I'm doing wrong?


My E6600 wont hit 3.6 either yet :oops: 
!