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7% oc

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November 26, 2008 10:31:07 AM

anyone think it's dangerous on stock cooler?

i have a E8400 and wanted to do it, hoping it's a safe range

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November 26, 2008 10:46:51 AM

It is pretty much impossible to burn your cpu these days. If it overheats, it shuts down.

Do the overclock, run prime95 and get some app to check your temp.
a c 172 à CPUs
a c 197 K Overclocking
November 26, 2008 10:54:37 AM

You ought to be able to push it to 3.3 GHz (367X9) with the stock coooler.

And like daskrabbe says, if it over heats, the CPU will shut it down.
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November 28, 2008 10:39:44 AM

i oc'ed to 3.16ghz

idle temps are:

cpu - around 30-31
cores - between 31-34

i did a small quick test on prime95 for 4 mins and the temps went up to around 63 celcius

the idle temps seem fine and indicate i could OC more, however those Prime95 i got worry me and make me think i shouldn't go further
a b à CPUs
a b K Overclocking
November 28, 2008 12:49:22 PM

Get the latest Realtemp and keep the distance to tjunction at or above 30c and your good.
November 30, 2008 8:28:46 AM

im not sure which to trust

asus probe and everest say 30º at idle

realtemp says 25º

there's always a 5º difference between them
a b à CPUs
a b K Overclocking
November 30, 2008 8:44:58 AM

Deadstar said:
im not sure which to trust

asus probe and everest say 30º at idle

realtemp says 25º

there's always a 5º difference between them

The temperature is calculated using a basic formula:

Core temp = Throttle temperature - sensor output

You sensors don't actually output an absolute temperature, but a temp relative to the throttle temp. You will often hear the term "Tj Max" or "Tjunction Max" which refers to this throttle temperature. The problem is nobody can be absolutely certain what the throttle temperature is, so different programs use their own values based on "estimates" in documentation or testing (most the former, Real Temp usually the latter when possible). If that throttle temp is assumed 5C different from one program to another, the temperature will always be reported as 5C different. What never changes between programs is the distance to Tj Max being outputted by the sensors, and keeping this above 30C will ensure stability in all but the highest overclocks.
November 30, 2008 9:52:38 AM

thanks for the explanation, i didnt know that cheers!

i'll be monitoring the situation, though for now i might leave it at 3.16ghz cause its not like im needing an increase in performance.


one question, out of curiosity:

is a E8400 OC'ed at 3.16ghz equal performance-wise to a E8500? and oc'ed at 3.33ghz equal to a E8600?
a b à CPUs
a b K Overclocking
November 30, 2008 9:24:12 PM

There should be no reason why it wouldn't be.
!