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Need some help overclocking E6600 on my Gigabyte E-P35-DS3L...

post #1 of 10
Thread Starter 
I've managed to get a seemingly stable overclock at 3.15ghz (350x9) with a memory multiplier of 2.5 (taking my DDR2-800 to 875mhz). I'm running memory at 4-4-4-12 timings. CPU Voltage is at 1.47v (used CPUID HW Monitor to check), if I take it any lower I get errors after running prime95 for ~45 minutes.

The problem I'm having is I see others running this same exact processor, on this same exact motherboard, at 3.5ghz with 1.45 CPU voltage. Since I'm still somewhat new to overclocking, I'm wondering if it is normal for my processor to only be able to run at 3.15ghz (tried running at 3.2ghz and could not get a stable overclock until 1.5v!, which created too much heat). Is it possible that I just got unlucky with my processor, and it just isn't a good overclocker? Or is there a BIOS option I'm missing that is important. I always assumed raising my voltage would allow me to overclock a bit higher, until I eventually hit a wall due to heat. This isn't the case though, I can run fine at 3.15ghz @ 1.47 CPU Voltage. But once I raise my CPU up to 3.2ghz, I am only able to run prime95 without an error for less than a minute, and can't maintain any stability until I raise the voltage to 1.5v (too much heat ).

I also have a question regarding heat, how hot is too hot? Currently (at 3.15ghz) my CPU sits at 64c after prime95 has been running for a few minutes. Is this too high? How much higher can I go?

I have tried changing the memory timings up (5-5-5-15) but the problem appears to be only related to the CPU. So is it possible my cpu is just "unlucky"? What else can I try? I'm basically just shooting for 3.2ghz (higher would be better, but there would be but im afraid there will be too much heat since my room is pretty hot during the summer.)

I am aware that the E-P35-DS3L (energy saver version of the regular ds3l) is having problems with keeping the voltage settings (for some people) but this doesn't seem to be the case for me. I can change to voltage up to 1.5v and it will remain there, it just creates too much heat like I said before.

My main concern is seeing others running the same cpu/mobo with lower voltage and a higher overclock. Thanks for taking the time to read, any help is appreciated =]

On an unrelated topic (still related to heat I suppose), is it safe/normal for my XFX 8800 GT 512mb (Zalman Edition), which includes a zalman GPU cooler, to run at 76c when running FurMark?
Edited by mkeygmer - 6/12/08 at 6:08am
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post #2 of 10
Try increasing your MCH voltage by +.1v.
 
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post #3 of 10
Thread Starter 
Quote:
Originally Posted by onlycodered View Post
Try increasing your MCH voltage by +.1v.
Thanks for the quick response, going to try that now.

EDIT: I raised the MCH by .1v, kept the same vcore, and tried to bring it up to 3.24ghz (360x9). Once I run prime95 it immediately stops with an error on the first thread. =(
Edited by mkeygmer - 6/12/08 at 6:16am
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post #4 of 10
gigabyte-ga-p35-ds3l-thread.html

lots of new ga p35 owners today

follow link, all you need to know
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post #5 of 10
Thread Starter 
Quote:
Originally Posted by 10acjed View Post
gigabyte-ga-p35-ds3l-thread.html

lots of new ga p35 owners today

follow link, all you need to know
Yea I already looked at that thread, before I started overclocking on this board at all. However it still doesn't answer my question as to whether 3.15ghz is somehow my CPUs limit, once I switch up to 3.2ghz it won't go stable till I step the vcore all the way up to 1.5v (even though I can run 3.15ghz at 1.47v) Prime95 errors right away at 3.2ghz at 1.47v (or any other voltage up until 1.5v) My voltages are based off what I'm seeing in CPUID Hardware Monitor and not what I actually set them to in the BIOS. I see that others can run this same CPU/mobo combo at 3.5-3.6ghz at 1.45v, but I can't even run 3.2ghz at 1.47v
Edited by mkeygmer - 6/12/08 at 6:51am
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post #6 of 10
could be a fsb hole... try for 3.2-3.3 which should be 360x9 and 370x9

sometimes you will find that a certain fsb setting is not good, but just over that is fine..

also try bringing the mem down to 2.0, you will see more real time performance increase from higher cpu MHz than mem MHz
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post #7 of 10
Quote:
Originally Posted by mkeygmer View Post
Yea I already looked at that thread, before I started overclocking on this board at all. However it still doesn't answer my question as to whether 3.15ghz is somehow my CPUs limit, once I switch up to 3.2ghz it won't go stable till I step the vcore all the way up to 1.5v (even though I can run 3.15ghz at 1.47v) Prime95 errors right away at 3.2ghz at 1.47v (or any other voltage up until 1.5v) My voltages are based off what I'm seeing in CPUID Hardware Monitor and not what I actually set them to in the BIOS. I see that others can run this same CPU/mobo combo at 3.5-3.6ghz at 1.45v, but I can't even run 3.2ghz at 1.47v
Every chip is different... Hit and miss situation. Maybe you got a "Bad" one the won't overclock much.

~B~
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post #8 of 10
Thread Starter 
Quote:
Originally Posted by BlankThis View Post
Every chip is different... Hit and miss situation. Maybe you got a "Bad" one the won't overclock much.

~B~
Yea it appears I probably did get a "bad" chip, however 3.15ghz isn't so bad

I tried switching to 3.3ghz in case of any fsb holes as suggested, but no matter what settings I used, I couldn't manage to run prime95 longer than a few seconds without an error at anything over 3.15ghz (even 3.19ghz) and can't get it stable without raising voltage too high and creating too much heat. Must just be my chip =/
Edited by mkeygmer - 6/12/08 at 7:29am
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post #9 of 10
3.15 isn't bad... and a 150MHz won't make THAT big of a difference.

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post #10 of 10
try +.2 to both MCH and FSB.
Most of the time once you pass 3.0 or so, specially with a quad you will have to begin to raise voltage for everything.

also with tight timings by having it set to 2.5 its putting alot of strain there, with your devider at 2:3(i think), 2.0 will put it at 1:1 and less strain..


I usually try to mimic a simalar system then decrease/increas if needed

I havent seen many Q6600 not able to reach 3.2-3.4, it may just take you alot of adjusting to get stable... but thats the fun part, Im stable and get bored trying to figure out what I can do next

in regards to your GPU, use evga precision or rivatuner to set fan to 75%, it should bring it down a bit...
If the zalman is plugged to your motherboard it will be in bios under "aux or case fan"
Edited by 10acjed - 6/12/08 at 9:02am
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