E7200 Overclocking

[Obsy]

Hello all.

This is the stuff I've got:
*CPU: Intel Core 2 Duo E7200 M0
*Cooler: stock
*Motherboard: Gigabyte GA-EP45-DS3L
*RAM: Patriot Viper 4GB (2 x 2GB) PC2-6400

Using a 9.5x multiplier, I can't get this thing past an FSB of 372MHz for the love of god, and it's only stable at 350MHz. The 372MHz hangs in Prime95 within minutes while the 350MHz FSB runs for hours on end with no errors.

I saw that quite a bit of people have gotten their E7200s to run at 4.0GHz with 8x500, but I have absolutely no luck in getting that, not even with a Vcore of 1.5v that I tried once.

I aimed for 9.5x400 with 1.4v, but even that failed to POST.

Bumping my memory up to 2.1v didn't help either.

Help! =[

Thanks in advance!

 

[error8]

Read the the sticky, there you'll find all the answers to your questions.

And remember that you'll never be able to be stable at 9.5X400 with 1.4 V vcore, or you can probably be and hit 100C. It's way too much for that pathetic stock cooler and it's over the maximum voltage intel says it's safe ( 1.36V ). You should aim for something to around 3.5 ghz, but I believe that even that is a bit too much for that heatsink, especially if the cpu likes more juice.

 

[RallyMaster]

Originally posted by: Obsy
*Cooler: stock

That's why.

 

[E4300]

Use default CPU multiplier. Manually set RAM divider to 1:1 (FSB = RAM speed). Manually set RAM timing and voltage to specs. Manually set Vcore to 1.34. Manually set VTT, VNB, and VSB to default values.

The CPU will probably run up to 72C under Prime with the stock cooler. That's within spec. My E7400 @ 4.03GHz/1.25V CPUz (lapped with AS5 between heat spreader and CPU core) runs Orthos @ 48C with 72F ambient. I use the Big Typhoon.

The nominal OC for the E7xxx line is 3.7-3.8GHz.

 

[betasub]

That's helpful info, E4300, but the temperature data would be more useful if you stuck to a single scale - that Orthos run is what, maybe +24C above ambient?

 

[Obsy]

I managed to boot up with 3.8GHz (400x9.5), thanks for the replies! but it's incredibly unstable like so.

So the stock cooler is what's preventing me from getting a stable 4.0GHz clock?

Oh and I'd be happy if you guys could check these BIOS settings for me. other than the cooler, nothing else is preventing me from a 4.0GHz OC? i wanted to try bumping up the voltage on SB and NB but I couldn't find where to in this BIOS.

http://i397.photobucket.com/al.../pp60/Obsy92/004-0.jpg

http://i397.photobucket.com/al.../pp60/Obsy92/002-0.jpg

http://i397.photobucket.com/al.../pp60/Obsy92/003-0.jpg

http://i397.photobucket.com/al...pp60/Obsy92/001-00.jpg

 

[vj8usa]

Originally posted by: Obsy
I managed to boot up with 3.8GHz (400x9.5), thanks for the replies! but it's incredibly unstable like so.

So the stock cooler is what's preventing me from getting a stable 4.0GHz clock?

Changing your cooler will do nothing but reduce temperatures. It'll give you more room to up voltage if needed, but it won't make the system any more stable at the same settings (unless you're overheating, of course). Is 400 stable with a lower multi?

 

[error8]

Originally posted by: Obsy
I managed to boot up with 3.8GHz (400x9.5), thanks for the replies! but it's incredibly unstable like so.

So the stock cooler is what's preventing me from getting a stable 4.0GHz clock?

Are you even checking your temps during testing? You have already been warned about the temperature issue at high vcore, with that stock cooler but you keep trying at 1.4 V.

Read the sticky, learn to oc and then come back here with questions. Because as I'm seeing it now, you're just bumping the vcore and increasing the FSB blindly, trying to get it somehow stable, when it probably reaches 100 C during prime.

 

[Obsy]

Originally posted by: vj8usa
Changing your cooler will do nothing but reduce temperatures. It'll give you more room to up voltage if needed, but it won't make the system any more stable at the same settings (unless you're overheating, of course). Is 400 stable with a lower multi?

8x multi blue screened and failed Prime95 in a second.
7x multi was at the Welcome screen but wouldn't go further
6x multi blue screened after loading Vista

I tried them all with 1.2v and 1.3v.

 

[Obsy]

Originally posted by: error8
Are you even checking your temps during testing?

Sorry, didn't realize I wasn't posting the temps in this thread.

The maximum I got to before blue screening with 400x9.5 1.3625v is 64 C. I'm pretty sure it would go higher but it won't stay up for that long without getting a BSoD or error in Prime95.

62 C max with 350x9.5 after 5 1/2 hours of Prime95 on 1.3v. I've tried 1.2v but it errors in Prime95 so I'm steadily raising it.

PS
I use Core Temp, RealTemp and SpeedFan. I used maximums from RealTemp.

 

[error8]

64 C is not that bad, if that is the maximum you get under Prime95, but you said it was going higher. Touching 70 C in Prime means that you could probably get to 85-90 C in Linpack and it's not all that great.

If I was to have that chip with the stock cooler, I would just try to find the maximum I could get out of 1.3 V. That would seem a cool and safe voltage. Everything above that would require a better cooler. 3.8-4 ghz is certainly not achievable with stock heatsink. Get a cheapo AC Freezer 64, if you don't want to spend much, it will give way more headroom for your oc.