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E6600 Wall

post #1 of 10
Thread Starter 
Looking for some good advice on tweaking this overclock.

Rig Info:
Intel Core2Duo E6600 SL9S8
OCZ Platinum DDR2 800 4-4-4-15 2x1GB
Abit IP35 Pro Last BIOS
Sapphire 4770 512MB
Seagate Barracuda 7200.10 250GB
Windows 7 Premium 32-bit

Stock Settings:
CPU Clock: 2400mhz
CPU Voltage: 1.35
CPU VTT: 1.20
NB Voltage 1.20
Memory Clock: DDR800 [680-780]
Memory Timings: 4-4-4-15
Memory Voltage: 1.9v-2.1v [2.0V]
All CPU Features are Disabled.

All tests below were done at stock speeds and voltages excluding ram which fluctuated but did not exceed rated speed of 800.

2500mhz/1.35v - Stable in prime blend 30 minutes 36c-37c load
2600mhz/1.35v - Stable in prime blend 30 minutes 36c-37c load
2700mhz/1.35v - Stable in prime blend 30 minutes 36c-37c load
2800mhz/1.35v - Stable in prime blend 30 minutes 36c-37c load
2900mhz/1.35v - Stable in prime blend 30 minutes 35c-39c load
3000mhz/1.35v - Failed to boot into windows. Froze on black screen with mouse icon.

Now heres where things start to get interesting.

3000mhz/1.36v - Boots into windows, but fails prime blend within 1 minute.
3000mhz/1.37v - Boots into windows, but fails prime blend within 1 minute.
3000mhz/1.38v - Boots into windows, but fails prime blend within 5 minutes.
3000mhz/1.39v - Boots into windows, stable in prime blend 30 minutes 37c-41c load
3100mhz/1.39v - Failed to boot into windows
3100mhz/1.39v - Raised NB to 1.29v and VTT to 1.23v. Failed to boot into windows.
3100mhz/1.40v - Reset NB and VTT. Boots into windows, but fails prime blend within 1 minute.
3100mhz/1.40v - Raised NB to 1.29v and VTT to 1.23v. Failed to boot into windows.
3100mhz/1.41v - Reset NB and VTT. Boots into windows, but fails prime blend withing 1 minute.
3100mhz/1.41v - Raised NB to 1.29v and VTT to 1.23v. Booted into windows, but fails prime blend within 1 minute.
3100mhz/1.41v - Raised NB to 1.33v and VTT to 1.27v. Booted into windows, but fails prime blend within 1 minute.
3100mhz/1.42v - Reset NB and VTT. Boots into windows, prime freezes and eventually crashes.
3100mhz/1.42v - Raised NB to 1.29v and VTT to 1.23v. Booted into windows, prime freezes and eventually crashes.
3100mhz/1.43v - Reset NB and VTT. Boots into windows, but fails prime blend within 5 minutes.
3100mhz/1.44v - Boots into windows, stable in prime blend for 30 minutes. 42c-45c load

As you can see, after 2900mhz the chip just fights me every step of the way. Getting the chip stable at 3ghz is quite a chore. Raising the vcore from 1.35v to 1.39v for 100mhz of speed. 3.1ghz is even worse, I have to raise the vcore even further from 1.39v to 1.44v. So is there anything I can do to help lower the vcore and get the chip stable? I feel like I am missing something here. I feel like I've been jipped. I used to always read how Intel chips overclocked way better then AMD.

Should I try for 3.2ghz? I'm just assuming I would have to push to 1.48v or even 1.49v to run 3.2ghz. I wouldn't be running the PC 24/7 but it would see up to 8 hours of constant use at a time.
post #2 of 10
That vcore is very high for the clock. You shouldn't need any more VTT than stock as your FSB must be under 350 MHz. PLL doesn't usually help at these clocks either.

All I can suggest is that either you have a very bad OCing chip or vdroop is quite high on your board. Have you looked at your vcore in CPUz whilst running prime?
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post #3 of 10
Thread Starter 
That I honestly couldn't tell you. No program I run will report my current vcore. CPUz, Coretemp and HWmonitor all just show a constant 1.35v which is the stock speed. In bios with vcore set to 1.44v it reports fluctuation between 1.42v-1.43v. If you know of any other voltage monitoring software let me know. I would try using a volt-meter, but I don't have an analog. The chip doesn't go over 45c in prime at 1.44v at least......
post #4 of 10
Thread Starter 
Quote:
Originally Posted by ARandomOWl View Post

That vcore is very high for the clock. You shouldn't need any more VTT than stock as your FSB must be under 350 MHz. PLL doesn't usually help at these clocks either.
All I can suggest is that either you have a very bad OCing chip or vdroop is quite high on your board. Have you looked at your vcore in CPUz whilst running prime?

I've also read that there a 2 different batches of these chips. One batch runs at a lower voltage and overclocks much better, but runs hotter. And the other batch has a higher vcore, require more voltage to OC but runs cooler. Honestly sounds like a contradiction to me.
Edited by Bryst - 11/21/11 at 1:11am
post #5 of 10
Ah yes, there is a G0 stepping which is the newer, lower power variant. It may be that you have the older B3 stepping. I'm not familiar with the OCing characteristics of the B3s.

It is true that the G0 runs cooler due to it's lower TDP. They are better clockers too.
Edited by ARandomOWL - 11/21/11 at 1:14am
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post #6 of 10
Thread Starter 
Well, I would tell you the vdroop on the vcore.... I found software that properly reports the vcore, uguru. But its such a POS. it spazzes out and shuts down my PC because my CPU fan RPM is to high or some crap. All I know is at 1.35v it droops to 1.32v in prime blend. I tried turning off every option to shutdown when there was a warning for that software, but it still shuts down my pc at any clock speed over stock.
post #7 of 10
Quote:
Originally Posted by Bryst View Post

Raising the vcore from 1.35v to 1.39v for 100mhz of speed. 3.1ghz is even worse, I have to raise the vcore even further from 1.39v to 1.44v. So is there anything I can do to help lower the vcore and get the chip stable? I feel like I am missing something here. I feel like I've been jipped. I used to always read how Intel chips overclocked way better then AMD.
Should I try for 3.2ghz? I'm just assuming I would have to push to 1.48v or even 1.49v to run 3.2ghz. I wouldn't be running the PC 24/7 but it would see up to 8 hours of constant use at a time.

As stated VTT/NB should not need to be touched, your temps are good and you under the max voltage so you could go higher.

you are struggling because of that chips High VID: 1.35v (most I have seen have been around 1.25v) so compared to some E6600 OC's you will have to feed more Vcore for a higher clock.

edit: just had a quick google around and most people can get to around 3Gz but 3.2Ghz can be done by only some chips/boards
Edited by aramil - 11/21/11 at 4:07am
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post #8 of 10
Quote:
Originally Posted by aramil View Post

As stated VTT/NB should not need to be touched, your temps are good and you under the max voltage so you could go higher.
you are struggling because of that chips High VID: 1.35v (most I have seen have been around 1.25v) so compared to some E6600 OC's you will have to feed more Vcore for a higher clock.
edit: just had a quick google around and most people can get to around 3Gz but 3.2Ghz can be done by only some chips/boards

Yes, I agree with this. Looks like high VID + G0 is limiting you somewhat.
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post #9 of 10
Thread Starter 
Well maybe ill just look for another C2D and sell this one.... really wanted to hit 3.2ghz at least. The E8xxx series are to much, anyone know how the E7xx series compares to a E6600? I know its lower L2 cache but the E7400 is a G0 stepping.
post #10 of 10
Quote:
Originally Posted by Bryst View Post

Well maybe ill just look for another C2D and sell this one.... really wanted to hit 3.2ghz at least. The E8xxx series are to much, anyone know how the E7xx series compares to a E6600? I know its lower L2 cache but the E7400 is a G0 stepping.

The E7000 are based on the Wolfdale architecture, the same as the E8000. They will clock much better than your E6600 (Conroe based).
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