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E8400 OC and Temps

Zayla74

Weaksauce
Joined
Apr 26, 2008
Messages
64
Hello all. I finally got my new RAM and been trying to OC my CPU a bit more, to reach my goal of 3.6, 400/800 - which my old RAM fell just short of.
I ended up getting these : http://www.newegg.com/Product/Product.aspx?Item=N82E16820145194

I had a couple questions though hoping someone who knows more than I can help.
First of all, I have the DFI X48 Dark board, and there is no actual adjustment for CPU voltage. Only a special add option.

@380 FSB and 3.4 I had to only give a little voltage.. +.025 to be 100% stable. this was = to 1.2V ... around 1.9 under load. approx.

I found going to a 400 fsb to get the 3.6 and 800 speed RAM required a few bumps in voltage to get there. In fact, +.0875.
ATM, Im showing 1.28V @ idle and 1.24 under full Prime load. (vdroop i know :p )

Also, I was showing idle temps at around 41C and load around 58-59.

NOW, im showing 44-45 idle and on avg 63 loaded, (spuikes at times 64-65)

Now, as far as my temps, im goping by my DFI Guardian. I have used real temp as well, and it shows basically 5C cooler.

Topping out around 60C averaging 55C under full load.

I have read w/the 8400's real temp isd actually the most accurate, However, for the sake of argument, lets assume the guardian is correct since it is the highest.

So, my 2 questions:
is the 1.28 volts too much for this cpu?
IS a 63C avg or so OK?

I have tried lower voltage 1 bump down @ a time, but it fails in prime 95 either immediately or after a minute. Still stress testing but actually stable at these setting under full load for an hour now. (I know i must test more)

May sound dumb, just dont wanna go to far, or push temps to high. Better safe than sorry :p. It just seemed a bit of a jump in voltage and heat to get here from what it was.

BTW, being Prime 95 kept giving rounding errors pretty fast, I ran memtest overnight. (14hrs actually) and it says RAM is just fine. It would appear it was voltage ;-/

**EDIT: I just reseated the HS as well, using MX2 TIM, and it hasnt been shutdown for any length of time since. Perhaps it will drop in temps after a burn in?? Im not sure but seems its not jumping over 62-63 now under full load.(according to dfi guardian)

Thanks all.
 
My 8400 hits 3.6 with 1.25 volts, it idles at 36 and 48 loaded. I have a tuniq tower 120 with AS5
 
1.28v is within intel recommended voltage for e8400. i'm currently running my e8400 at 1.34v and it's on 24/7. no issues at all. stable like a rock at 4 ghz.

63 degrees (would be 57 on real temps) at load seems fine.
 
With these wolfdales you want to keep them under 1.45vcore to avoid any potential problems. As well as running the cpu vtt under 1.4. When I first got mine I ran it at 4ghz using 1.344 load, then after it past through the burn in period it required one bump in vcore to be stable. Now I just run it a 3.82ghz with 1.264vcore.
 
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