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Intel core 2 duo e7500 probleme

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Hello, i update my system, so i bought a new processor. i replaced my old c2d e4600 to e7500. (i have gigabyte ep 35c ds3r, with the lastest bios F4). When i installed the cpu and run windows i check with cpu-z. First weird thing that i noticed, my cpu run at 2,1ghz (8x266), (the original clock at 2,93ghz (11x266). C1E , and eist enabled. Then i go back to bios then i set up the new clock ratio. Before the adjust cpu wei score-> 5,9 , after 6,4 . The question is why my cpu run at 2,1ghz (in default speed ?) If i run at 266x11 and in 2,93ghz will be ok ? or i should switch back ? (sorry for bad english)

this might be obvious
but could it be Intel Speedstep (eist)
if your not familiar with Speedstep
it determines CPU speed by usage demands
right now my C2D 2.93 (11 x 266) is running
at 1.6 (266x6)
when I start using a demanding application (avi encoder) it
will go up to 2.93
if I am just browsing it is around 1.6-1.8
the E7500 is designed to run at 266 x11 multiplier
I have an E4500 at OC 2.93 which is very similar performance

Download gigabyte's Easy tune 6 It will o.c. your system automaticly with in the specs that you set. My c2duo 7300 has been at 3.2 from 2.66 rock steady on stock Intel HS and fan for a few years . You will notice a difference.
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Best solution

no leave voltage alone!
if you are not familiar with Overclocking then dont play with voltage

you could go google beginner guides to OCing a core2duo and learn if your
not sure how to do it
but start off with just changing fsb mildly
otherwise just leave your settings alone

it is odd that it defaulted to 8x but if it is working ok now
then you are perfectly fine
that cpu is designed to run at that speed
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