Need help !! E8400 @ 4.0

roush2fast

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Hello computer enthusiasts, I need some help.


E8400
XFX 680i
EVGA 9800GTX+
Corsair cm2x2048 (x2) 5-5-5-15-30


I am trying to get my system to stabilize at 4.0. I can game for about 45 minutes then it reboots. I have tried all sorts of CPU voltage settings, run linked and synced or w/o, bumped my mem voltage/timings and messed with every option I am somewhat familiar with but I just can’t seem to get stable. I really notice a significant advantage from being at 4.0 so I really want to leave it there. Currently I’m at 3.6 with no problems.

So, my question is: given my system components do you have any recommendations for system settings to get this sucker to run at 4.0?

A friend suggested I change the NB or SB voltage but I want someone’s opinion that is a little more knowledgeable in this field.

Thanks in advance.

P.S.

While typing this I just thought about my vid card fan speed. I currently have it at stock which is like 35%. Do you think this could be attributed to the crashing?


 

RJR

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Well not familiar with the Nvidia 680i board but with my Asus P5KC (I know not one of there best) P35 board I worked my E8400 (E0) up to 4.0 Ghz with the 9X multiplier and it took too much voltage for my liking.

I then worked it up with the 8X multi to 500 FSB and it only took 1.280 Volts and one bump up on the NB voltage. Perfectly stable, so thats where I've left it.

You may want to give that a try if your board doesn't mind a higher FSB.
 

Huttfuzz

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Forget FSB 500 with an 680i.
Try that. Memory at 1:1 Ration. FSB 445 x 8.5.
North Bridge voltage 1.45 or so. CPU FSB (termination) 1.3. Vcore 1.36.
Now if that is stable under prime95 small FFT, try lower the vcore a bit and retest it until it's not stable. That worked for me on a 650i chipset.
 

RJR

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Are you using DDR2-800 Ram????

If so you are going to be limited by your Ram OC. I would lower the multi and raise the FSB to see how far you can push your ram. Keeping it at 1:1 as stated by Huttfuzz.

That and your boards FSB limit will tell you exactly how far you can push it.

Your best bet would be to start at your last stable optimized (lowest voltage/settings) OC and slowly work your way up, but that's just me because I know most people just like to raise the FSB to what they want and then try to figure out what settings might work with it.

Keywords last post: WORKED IT UP


Either way good luck.

 

roush2fast

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Thanks for the input !


Ok well I just completed my first successful run of 3d mark 06 at 4.0. This was done with the normal multiplier and 1:1

Take a look at the screen shot and tell me what you think in regards to the temp, voltage and score. I will get around to running orthos this weekend to determine complete stability but I'm happy it ran Futuremark.

I had to bump the vcore to 1.376 after vdroop, is this a bit too high? The funny thing is that in my previous attempts I think I actually had the vcore a tad higher. I guess I just hit that sweet spot. The temps look acceptable.

http://i39.tinypic.com/2mnkaac.jpg
 

OMGiTzzFATAL

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Your temps dnt look to bad, BUT to some stress testing under interburntest (that program burns my CPU to ash >.<) Make sure you watch your temps like a hawk,!!!
That is alot of Vcore, Try raising the NB voltage (this helps with higher FSB speeds)

Try 1.30+, but i wouldnt go past 1.40v

I've got my E8400 E0 at 4ghz with 1.200Vcore under load, So i think you could/should be able to lower that Vcore if you play around with some of the other Voltages, Just be carefull

Good luck =]
 

theAnimal

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You aren't jumping from 3.6 to 4 are you? Move up in small increments (5MHZ), test and repeat.
 

roush2fast

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Whoa Fatal !!!! 1.2 wow I am going to reset cmos and start over. Even though my temps are acceptable I really don't like that much vcore. I will start from scratch and try burntest as you suggested. Post back this weekennd with results.


Thanks
 

OMGiTzzFATAL

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Okay bud, Not all CPU's are the same though, they all OC differently, If you have an E0 revision like myself then 4ghz should be a walk in the park.

Start at 3.6ghz with a high voltage like 1.35000V then see if its stable, If it is then lower the voltage 1 notch and check for stablity, if thats stable lower again.....Until you find the lowest voltage for 3.6ghz.

Next raise the CPU frequency by about 5-10mhz (remember this number is mulitplied by 9) and raise the Vcore by 1 notch, if that is not stable raise it again.

If your finding that uve raised the Voltage by alot for just 5-10mhz increase, then it might be unstable because of something else, like the northbridge voltage.

Check CPU-Z to find out what revision you have.

P.S i leave SB at stock, even for 4.7ghz

P.P.S intel burn test is a quick way to test for stablity, But gives you the highest temps, Another way i test for stablity is to run orthos for about 8 hours and run 3Dmark06 at the same time, Just to really spice things up :D

Good luck let us know how you get on!