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What are the safe (and starting) values for Intel Core2 Duo chips?

post #1 of 5
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I'm upgrading my AMD Opteron system for an Intel Core2 Duo system and I have no idea what values (eg. temperature, voltage) are "normal" and which are "safe" for Core2 Duo (and P965 chips, and G.SKILL HZ DDR2 RAM).

Where can I find this information? I need it so I know where to start and how much I can safely push the system without damaging anything... (eg. voltage and temperature)

...and yes, I've read the sticky about Inte overclocking at the top of this forum but it doesn't discuss specific numbers so that's why I'm posting this thread.

Thanks a TON for any help!!!
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post #2 of 5
In the broadest terms, a C2D chip is save under 60C load and under 1.5vcore; I am unfamiliar with appropriate voltage on the P965 chips and G.SKILL HZ DDR2 RAM.
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post #3 of 5
The G.Skill HZ ram which I recently bought had a sticker on the package saying 2.0-2.1v. Yours probably has a similar sticker.

And the CPU packaging also has a sticker with a bunch of bar codes on it. You'll see the CPU max voltage there. My e6420 says 1.35v.
     
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post #4 of 5
hz's ok to max of 2.3 volts (i've not needed more than 2.1)

C2D's say on box "don't exceed 1.35 volts" and I keep mine at that, but they're supposedly safe up to 1.5 IF temps are < 60
post #5 of 5
Most BIOS start at 1.275 on the C2D. There are three sensors on a C2D--a pair of t junction sensors that are in the 2 cores at their hottest points and another (t case) between the cores at IHS level that is aprox 15C cooler than the t junction.

The latest SpeedFan will monitor all three. The BIOS uses a map algorithm to convert those three into the temps you see in the Hardware Monitor or PC Health menu. That is why you hear about so many different temps that are "safe"

Considering that there is a 3C variable to the temp readout and a 15C delta between t case and t junction the safe temp reading would be below 65C t case and 50C tjunction.

In simplest terms startup voltage will likely be about 1.31 on most mobos and safe overvolting (with sufficient cooling) tops out at 1.5 Vcore. and safe temps would be below 65C. Ideally you would want to stay below 56C 24/7.

Since you are going to find some new options on the chipset pay attention to the MCH voltage. This should be about max 1.65 when overclocking--although you can get as high as 2.0 with some BIOS/mobos it will rapidly degrade the stability of the board.

Most MCH start at around 1.55

MCH is critical voltage when overclocking--analogous to the NB voltage of NV boards.

I would not recommend overvolting the RAM unnecessarily. Be sure that over volting is required--because in my experience over volting when un-needed for stability will actually cause random instability due to heat and quantum tunneling effects that displace electrons used as marked for data.

Depending on your processor and mobo you may need to apply a lot of voltage to overclock much past 30%--this ramps up dramatically with each slight increase while attempting reach the max stable OC and will soon enough go beyond "safe" temp and voltage thresholds. Even superior cooling like phase will not protect the components from degradation due to long term overvolting so take care and welcome to the Dark Side.
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