C2D E6700 overclock

[hhhd1]

I have got a new old e6700 266*10 1.35v processor,

tried to apply a mild overclock,
increased FSB from 266 to 315
increased volt from 1.35v to 1.3625 (2 steps)

ran stress test for 5 minutes, temperature reached 73c , and then it crashed with a blue screen

using the stock fan, with cheap thermal paste.

The MB is Gigabyte p31-ds3l, and I tested it at FSB 333 with a E8xxx C2D processors, and it was fine.

My question is:
Is that normal, or is this a bad processor batch, or has it been overclocked before to the level of being unstable ?

 

[.vodka]

Try another voltage bump, or two. That's a 65nm CPU, don't mind giving it voltage.

Run your memory 1:1 so you isolate it from the CPU and the FSB for the time being.

 

[VirtualLarry]

That stock vcore is pretty high, I wouldn't expect it to be much of an OCer because of that. (I ran a Q6600 at 3.6 at lower than you stock vcore.)

 

[hhhd1]

Try another voltage bump, or two. That's a 65nm CPU, don't mind giving it voltage.

Run your memory 1:1 so you isolate it from the CPU and the FSB for the time being.

But isn't that temperature a bit high ? and increasing the volt a bit will push it much more ?

My e2140 65nm used to take a mild over clock without any volt increase.

 

[.vodka]

It's high because you're using the stock heatsink (and you're using the best there ever was, the tall one with the copper core). Conroe is a cool running CPU for what it was back in the day, relative to the netburst crap, but once you start overclocking it'll get hot unless you get better cooling.

The fact that it lasted 5 minutes on the stress test means you're not too far from stability, else it'd have crashed right away. Back down to 3 GHz (333*9 would be ideal) instead of 3.15 (since you're testing 315*10) and it'll probably pass the test flawlessly. Why do you say you had tested your motherboard at 333 FSB just fine with an E8xxx CPU? Your e6700 doesn't POST at 333 FSB? That would be an insanely low wall...

I agree with larry, such high stock vcore can be an indicative of a poor overclocker, or one that needs loads of voltage on top of that high starting point to keep going higher. That's why I suggested more vcore, since that's what you're going to need here if this is the case.

 

[Soulkeeper]

hmm noticing that intel had two different E6700 chips
http://ark.intel.com/Products/Spec/SL9S7
http://ark.intel.com/products/42809/Intel-Pentium-Processor-E6700-2M-Cache-3_20-GHz-1066-FSB


you should have 6-10 mults unlocked (someone can verify this?), i'd try stability testing with a lower mult to find your max stable fsb before trying to max out the cpu frequency
My E5400 used to do 3.6GHz, older E4300 and Q9450 topped out just over 3GHz
Also note that your mb/psu/cooling all could be factors here

looking at your board's specs it appears better than the board I used on my E5400 (GA-G41M-ES2L (rev. 1.0))

 

[.vodka]

OP mentions 266*10 which is the stock speed of the original C2D E6700, 65nm. There is a 45nm chip named pentium E6700 which runs at 266*12. That is 3.2Ghz, already higher than what he's trying to stabilize at 315*10.

 

[Soulkeeper]

i'm guessing it's the high fsb that's the problem
my old chip was going from 200 to 266, going from 266 to 300+ is likely to present more of a challenge

 

[BonzaiDuck]

OP mentions 266*10 which is the stock speed of the original C2D E6700, 65nm. There is a 45nm chip named pentium E6700 which runs at 266*12. That is 3.2Ghz, already higher than what he's trying to stabilize at 315*10.

Ab-so-freakin-lutely, posi-freakin-tively.

The recycled model-code "E6700" was issued as a Wolfdale "Pentium" in 2010 March.

My memory is foggy, but I think I tried pushing it to 3.6 Ghz at maybe 1.31 to 1.33V on a low-end motherboard, passed the stress-tests and didn't like the options available on the board, so I set it back to stock.

The OLD CONROE E6600 or E6700 needed over 1.40V just to get to around 3.2-something Ghz.

OP -- what was the BSOD stop-code?

 

[hhhd1]

Thanks for all the replies

It is the old C2D E6700 (266*10), not the pentium dual core.

I am now using a different processor on that motherboard anyway, so need to get new thermal paste first before i can test E6700 again.

I was just surprised, because I can overclock my E2160 from 1.8 GHz to 2.1 GHz while undervolting, and with a mild volt increase i could reach 2.6 GHz stable on stock cooler.

The fact that it lasted 5 minutes on the stress test means you're not too far from stability, else it'd have crashed right away. Back down to 3 GHz (333*9 would be ideal) instead of 3.15 (since you're testing 315*10) and it'll probably pass the test flawlessly.

I will test again as soon as I get some new thermal paste

Why do you say you had tested your motherboard at 333 FSB just fine with an E8xxx CPU? Your e6700 doesn't POST at 333 FSB? That would be an insanely low wall...

Only saying that to answer for comments that might suggest that the old motherboard is bottleneck in overclocking.

Have not tested the e6700 with 333 FSB yet.

The OLD CONROE E6600 or E6700 needed over 1.40V just to get to around 3.2-something Ghz.

That is what I wanted to know

OP -- what was the BSOD stop-code?

if I remember correctly error 000000000000124