Allendale/Conroe OC'ing and EIST (or it's core2 version)

note : moved from the regular cpu forum


I currently run an OC'd d805 that's been built fairly recently.
I have no complaints whatsoever about performance, but heat output is rather high (Netburst...) and as I've been trying to make my computer into a very quiet rig (moved into a p180, got a seasonic psu, downvolted most fans to 7-9V, got 2xsamsung p120 drives... etc), I am now faced with the only component in my PC that refuses to be "compatible" with a quiet rig : my 3.6Ghz d805 (aka the ROOM HEATER).

I've been thinking of switching to a budget core2 cpu (6300/6400), since I can put my current nf4board + d805 to good use anyway.
I've almost decided on a DS3+E6300 setup, but recently I heard about the Allendales. A low stock FSB and a higher multiplier seems like an overclocker's dream. I was planning on taking that 800 stock FSB to around 1066(333*4), so I can reuse my current 667Mhz Corsair.
Also a native 2Mb cache (instead of a 4Mb with 2Mb disabled) should in theory contribute to a slightly lower heat output, all other factors remaining the same .... hopefully.

1. I expect the heat output will still be lower than what I currently get with my 90nm Netburst chip, is this reasonable?

2. Since this system is up most of the time (running a webserver and some other 24/7 neeeded apps), 80% of the time the CPU is near idle.
Will the Intel IEST (or whatever the multiplier-reduction energy savings mode is called for COre2) work well with an overclocked Chip?


Ideally I want my e4400 to run at 333/200*2.0 = 3.33Ghz (at 1066 FSB).
This seems like a reasonable OC, given what the Core2s can do.
But since it will be near idle most of the time, I'm really hoping the IEST can kick in when I'm not using my PC. I'm using a pwm controlled CPU fan, which would allow me to reduce the CPU noise to almost nothing when the machine is idling.


Any information (preferably first-hand) about their experience with overclocked Core2s and enabled IEST is appreciated.

Thx